Tootfinder

The judicial cases in OKC are closely linked to the silence and accountability of Tibetan Buddhist Heads of Nyigmapa Lineages in 🇫🇷🇧🇪🇵🇹. To grasp the full extent of responsibility and complacency, let's delve deeper into the matter. #TibetanBuddhism #Responsibility
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Is non-zero equation of state of dark matter favored by DESI DR2?
Tian-Nuo Li, Yi-Min Zhang, Yan-Hong Yao, Peng-Ju Wu, Jing-Fei Zhang, Xin Zhang
https://arxiv.org/abs/2506.09819

Is non-zero equation of state of dark matter favored by DESI DR2?
The nature of dark matter remains one of the most fundamental and unresolved questions in modern cosmology. In most cosmological models, dark matter is typically modeled as pressureless dust with an equation of state (EoS) parameter $w_{\rm dm} = 0$. However, there is no fundamental theoretical reason to exclude the possibility of a non-zero dark matter EoS parameter. In this work, we explore the possibility of a non-zero dark matter EoS within the phenomenologically emergent dark energy (PEDE)…

A novel method to trace the dark matter density profile around supermassive black holes with AGN reverberation mapping
Mayank Sharma, Gonzalo Herrera, Nahum Arav, Shunsaku Horiuchi
https://arxiv.org/abs/2506.10122

A novel method to trace the dark matter density profile around supermassive black holes with AGN reverberation mapping
We propose a new method to determine the dark matter density profile in the vicinity of distant supermassive black holes (SMBH) using reverberation mapping measurements of active galactic nuclei (AGN). For some AGN, the mapping of multiple emission lines allows us to measure the enclosed mass within different radii from the central SMBH, which allows us to infer or constrain the dark matter density profile on sub-pc scales. We find that for five out of fourteen AGN in our identified sample, the…

Light Dark Matter Detection with Sub-eV Transition-Edge Sensors
Muping Chen, Volodymyr Takhistov, Kazunori Nakayama, Kaori Hattori
https://arxiv.org/abs/2506.10070

Light Dark Matter Detection with Sub-eV Transition-Edge Sensors
We present a comprehensive analysis of high-resolution transition-edge sensors (TESs) as a quantum sensing platform for detecting dark matter (DM). Operating near the thermodynamic noise limit with sub-eV energy resolution, TESs offer a powerful approach for probing light DM in the sub-GeV mass range. Optical TESs, realized on superconducting films with critical temperatures below 150 mK, achieve energy thresholds below 100 meV and enable precise calorimetric detection of individual energy depo…

So the basic idea is that we first compute a "level" for whatever interaction, by adding beneficial modifiers and subtracting harmful ones. Imagine most modifiers are smallish integers like 2 or -3 (though they can be non-integers too). Each level can be thought of as making things twice as good/bad, although this only applies directly when they're balanced. The actual formula starts with a 50/50 chance of "success" at level 0, and then each positive level halves the chance of failure, or if the levels are negative, each negative level halves the chance of success (note that halving the chance of failure is not the same as doubling the chance of success).
The intuitive explanation is that you start with a coin flip. Then if the level is positive, you flip that many additional coins and succeed if any single coin succeeds, but it the level is negative, you have to flip that many additional coins and succeed only if *all* flips succeed.
For example, if I have a dagger with 5 crit chance, and I attack an opponent with no armor modifiers, I'd have to win any 1 of 6 coin flips to score a crit (p = 1 - (1/(2^6)) = 63/64. Increasing my crit modifier by 1 ups my chances only slightly, to 127/128. This is obviously pretty poor return, indicating that the 5 I already have is very strong. If the opponent had armor with -3 to crits, the interaction is now level 2, so the crit chance is 7/8, which is still pretty good. We can see from these examples that the basic system
rewards a small level advantage a lot, but the rewards diminish rapidly. The system has a few avenues for tweaking how it works though, that can let us modify this. There's also a potential benefit (though sometimes drawback) that no matter what the level gap, there's an effective limit to how much the interaction swings.

As a loyal subject of ZM Willem-Alexander Claus George Ferdinand, koning der Nederlanden, Prins van Oranje-Nassau, jonkheer van Amsberg, I am legally enjoined from supporting any 'no kings' movements. Thank you for your attention to this matter!

With the 5th #AAS246 presser come the paper https://arxiv.org/abs/2506.07262 (ALMA-JELLY I: High Resolution CO(2-1) Observations of Ongoing Ram Pressure Stripping in NGC 4858 Reveal Asymmetrical Gas Tail Formation and Fallback), the press release https://news.arizona.edu/news/belly-beast-massive-clumps-reveal-star-factories-bygone-era-cosmos (In the belly of the beast: massive clumps reveal star factories from a bygone era of the cosmos) and the papers https://iopscience.iop.org/article/10.3847/1538-4357/ada8a6 (UNCOVERing the Faint End of the z ∼ 7 [O iii] Luminosity Function with JWST's F410M Medium Bandpass Filter) with the press release https://science.nasa.gov/missions/webb/nasas-webb-uncovers-galaxy-population-driving-cosmic-renovation/ and https://arxiv.org/abs/2505.06198 (The "Dark-Matter Dominated" Galaxy Segue 1 Modeled with a Black Hole and no Dark Halo) with the press release https://www.utsa.edu/today/2025/06/story/researchers-offer-alternative-to-dark-matter-model.html

"DOGE had by fiat the authority to give thumbs up or down to grant applications which had been systematically vetted by layers of subject matter experts" https://time.com/7285045/resigning-national-science-foundation-library-congress/

Why I’m Resigning from the NSF and Library of Congress
I cannot participate in systems that require dishonesty as the price of belonging.

Quantum Algorithm Software for Condensed Matter Physics
T. Farajollahpour
https://arxiv.org/abs/2506.09308 https://arxiv.org/pdf/2506…

Quantum Algorithm Software for Condensed Matter Physics
This report offers a comprehensive analysis of the evolving landscape of quantum algorithm software specifically tailored for condensed matter physics. It examines fundamental quantum algorithms such as Variational Quantum Eigensolver (VQE), Quantum Phase Estimation (QPE), Quantum Annealing (QA), Quantum Approximate Optimization Algorithm (QAOA), and Quantum Machine Learning (QML) as applied to key condensed matter problems including strongly correlated systems, topological phases, and quantum …

EU's Frontex has published a children's book for children who are about to be deported
😲
https://op.europa.eu/en/publication-detail/-/publication/6eea0e99-e464-11ef-be2a-01aa75ed71a1
Official PDFs availabl…

Toolbox for children in return - Publications Office of the EU
Addressing the return of unaccompanied minors or children within families is a delicate matter that demands a humane approach. This approach must not only respect fundamental rights but also prioritise the child's best interests. Additionally, clear and comprehensive information about the return procedures is essential for those involved, enabling them to prepare as effectively as possible. One of the primary objectives of Frontex is to assist MS throughout all stages of the return procedures. …

Sources: Scale AI plans to promote Chief Strategy Officer Jason Droege to CEO, replacing Alexandr Wang, who is set to join Meta after its investment in Scale AI (Shirin Ghaffary/Bloomberg)
https://www.bloomberg.com/news/articles/20

Scale AI Picks New CEO as Alexandr Wang Set to Join Meta After Investment
Scale AI plans to promote Chief Strategy Officer Jason Droege to serve as its next chief executive officer following a multibillion-dollar investment from Meta Platforms Inc., according to two people familiar with the matter.

“[T]he mandate for [LLM] adoption can often come from above your CEO. Your execs can be as baffled as anyone else having to figure out where to jam AI into their product.”
“It does not matter whether LLMs can or cannot deliver on what they promise: people calling the shots assume they can, so it’s gonna happen no matter what.”
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Evading Dark Matter Bounds through NLSP-Assisted Freeze-Out with Long-Lived Signatures
Sarif Khan
https://arxiv.org/abs/2506.10618 https://

Evading Dark Matter Bounds through NLSP-Assisted Freeze-Out with Long-Lived Signatures
In this work, we explore a conversion-driven freeze-out scenario, where the next-to-lightest stable particle (NLSP) sets the dark matter (DM) abundance through the process ``NLSP SM $\leftrightarrow$ DM SM". Although DM is produced via a freeze-out mechanism, its interaction strength with the visible sector can range from weak to feeble couplings. This results in a vast, largely unexplored parameter space that evades current direct, indirect, and collider bounds, while remaining testable in the…

Perturbative QCD reveals the softening of matter in the cores of massive neutron stars
Oleg Komoltsev
https://arxiv.org/abs/2506.06465 https://

Perturbative QCD reveals the softening of matter in the cores of massive neutron stars
The cores of neutron stars (NSs) contain the densest matter in the universe. Rapid advancements in neutron-star observations allow unprecedented empirical access to cold, ultra-dense Quantum Chromodynamics (QCD) matter. The combination of these observations with theoretical calculations has revealed previously inaccessible features of the equation of state (EoS) and the QCD phase diagram. In this thesis, I demonstrate how perturbative-QCD calculations at asymptotically high baryon densities pro…

Simultaneous Segmentation of Ventricles and Normal/Abnormal White Matter Hyperintensities in Clinical MRI using Deep Learning
Mahdi Bashiri Bawil, Mousa Shamsi, Abolhassan Shakeri Bavil
https://arxiv.org/abs/2506.07123

Simultaneous Segmentation of Ventricles and Normal/Abnormal White Matter Hyperintensities in Clinical MRI using Deep Learning
Multiple sclerosis (MS) diagnosis and monitoring rely heavily on accurate assessment of brain MRI biomarkers, particularly white matter hyperintensities (WMHs) and ventricular changes. Current segmentation approaches suffer from several limitations: they typically segment these structures independently despite their pathophysiological relationship, struggle to differentiate between normal and pathological hyperintensities, and are poorly optimized for anisotropic clinical MRI data. We propose a…

 
A climate of fear is perceptible in the United States today,
and it must be resisted no matter what,
CBS News correspondent Scott Pelley says.
“People are silencing themselves for fear that the government will retaliate against them,
and that’s not the America that we all love,”
Pelley told Anderson Cooper in an exclusive interview after CNN’s Saturday telecast of
“Good Night, and Good Luck.”
The Broadway play, which recounts CBS newsman Edwar…

‘If you fall silent, the country is doomed’: CBS News’ Scott Pelley stresses courage as network faces pressure campaign
A climate of fear is perceptible in the United States today, and it must be resisted no matter what, CBS News correspondent Scott Pelley says.

from my link log —
Silent bugs matter: a study of compiler-introduced security bugs.
https://www.usenix.org/conference/usenixsecurity23/presentation/xu-jianhao
saved 2025-04-27

A cavity array microscope for parallel single-atom interfacing
Adam L. Shaw, Anna Soper, Danial Shadmany, Aishwarya Kumar, Lukas Palm, Da-Yeon Koh, Vassilios Kaxiras, Lavanya Taneja, Matt Jaffe, David I. Schuster, Jonathan Simon
https://arxiv.org/abs/2506.10919

A cavity array microscope for parallel single-atom interfacing
Neutral atom arrays and optical cavity QED systems have developed in parallel as central pillars of modern experimental quantum science. While each platform has demonstrated exceptional capabilities-such as high-fidelity quantum logic in atom arrays, and strong light-matter coupling in cavities-their combination holds promise for realizing fast and non-destructive atom measurement, building large-scale quantum networks, and engineering hybrid atom-photon Hamiltonians. However, to date, experime…

Soon, I’ll be throwing away all my desktop computers as well, though I’m keeping my Lenovo Thinkpad around. I hate computers, yet I use them.
To me, computers are just junk nobody asked for. They’re glowing traps that keep us hooked, scrolling and clicking away our time for endless feeds. No matter the OS or hardware, it’s all distraction from reality.
Yes, Linux can free us and all that, and even the hardware can be part of that freedom. But the computers themselves remain a cir…

Late time behavior in $f(R,\mathcal{L}_{m})$ gravity through Gaussian reconstruction and dynamical stability
Y. Kalpana Devi, S. A. Narawade, B. Mishra
https://arxiv.org/abs/2506.09568

Late time behavior in $f(R,\mathcal{L}_{m})$ gravity through Gaussian reconstruction and dynamical stability
In this paper, we explore modified gravity in the framework of $f(R, \mathcal{L}_m)$ theories by reconstructing the function $f(\mathcal{L}_m)$, where $\mathcal{L}_m = ρ$ is the matter Lagrangian, under the assumption of a pressureless, matter-dominated Universe. Using a non-parametric Gaussian process reconstruction technique applied to Hubble data, we obtain two viable models of $f(\mathcal{L}_m)$ : (i) a power-law model $f_1(\mathcal{L}_m) = α\mathcal{L}_m^{b_1}$ with $b_1 \in [0.018, 0.02…

Testing scalar dark matter clumps with Pulsar Timing Arrays
Philippe Brax, Patrick Valageas
https://arxiv.org/abs/2506.08786 https://…

Testing scalar dark matter clumps with Pulsar Timing Arrays
Scalar dark matter is a viable alternative to particle dark matter models such as Weakly Interacting Massive Particles (WIMPS). This is particularly the case for scalars with a low mass $m \gtrsim 10^{-21} {\rm eV}$ as required to make quantum effects macroscopic on galactic scales. We point out that by synchronising the measurements of arrival times of pairs of pulsars, Pulsar Timing Arrays (PTA) could probe ultralight dark matter (ULDM) scenarios with a mass $10^{-23} {\rm eV}\lesssim m \less…

A pipeline for Megahertz X-ray Photon Correlation Spectroscopy on soft matter samples at the MID instrument of European XFEL
Aliaksandr Leonau, Felix Brausse, James Wrigley, Mads B. Jakobsen, Amir Tosson, Michelle Dargasz, Nimmi Das Anthuparambil, Felix Lehmk\"uhler, Anita Girelli, Maddalena Bin, Fivos Perakis, Sebastian Retzbach, Fajun Zhang, Frank Schreiber, Matheus Teodoro, Cammille Carinan, Robert Rosca, Fabio Dall Antonia, Wonhyuk Jo, Ulrike Boesenberg, Angel Rodriguez-Fernan…

A pipeline for Megahertz X-ray Photon Correlation Spectroscopy on soft matter samples at the MID instrument of European XFEL
In this paper we present the experimental protocol and data processing framework for Megahertz X-ray Photon Correlation Spectroscopy (MHz-XPCS) experiments on soft matter samples, implemented at the Materials Imaging and Dynamics (MID) instrument of the European X-ray Free-Electron Laser (EuXFEL). Due to the introduction of a standard configuration and the implementation of a highly automated data processing pipeline, MHz-XPCS measurements can now be conducted and analyzed with minimal user int…

The Interplay of Polar and Nematic Order in Active Matter: Implications for Non-Equilibrium Physics and Biology
Varun Venkatesh, Niels de Graaf Sousa, Amin Doostmohammadi
https://arxiv.org/abs/2506.05931

The Interplay of Polar and Nematic Order in Active Matter: Implications for Non-Equilibrium Physics and Biology
Active matter has played a pivotal role in advancing our understanding of non-equilibrium systems, leading to a fundamental shift in the study of biophysical phenomena. The foundation of active matter research is built on assumptions regarding the symmetry of microscopic constituents. While these assumptions have been validated extensively, instances of mixed or joint symmetries are prevalent in biological systems. This review explores the coexistence of polar and nematic order in active matter…

Numerical modeling of isochoric heating experiments using the TROLL code in the warm dense matter regime
S\'ebastien Rassou, Marie Bonneau, Christophe Rousseaux, Xavier Vaisseau, Witold Cayzac, Adrien Denoeud, Fr\'ed\'eric Perez, Tom Beaumont, Morris Demoulins, Jean-Christophe Pain
https://arxiv.org/abs/2506.08912

Numerical modeling of isochoric heating experiments using the TROLL code in the warm dense matter regime
Experiments of isochoric heating by protons of solid material were recently performed at LULI laser facilities. In these experiments, protons, produced from target normal sheath acceleration (TNSA) of Au foil with the PICO2000 laser, deposit their energy into an aluminum or copper foil initially at room temperature and solid density. The heated material reaches the warm dense matter regime with temperature in the rear face of the material between 1 and 5 eV. The temperature is inferred by strea…

@… @… As Rachel Davies is fond of saying, you can’t really scale agile methods, no matter how “safe” you declare it.

A Bayesian Multisource Fusion Model for Spatiotemporal PM2.5 in an Urban Setting
Abi I. Riley, Marta Blangiardo, Fr\'ed\'eric B. Piel, Andrew Beddows, Sean Beevers, Gary W. Fuller, Paul Agnew
https://arxiv.org/abs/2506.10688

A Bayesian Multisource Fusion Model for Spatiotemporal PM2.5 in an Urban Setting
Airborne particulate matter (PM2.5) is a major public health concern in urban environments, where population density and emission sources exacerbate exposure risks. We present a novel Bayesian spatiotemporal fusion model to estimate monthly PM2.5 concentrations over Greater London (2014-2019) at 1km resolution. The model integrates multiple PM2.5 data sources, including outputs from two atmospheric air quality dispersion models and predictive variables, such as vegetation and satellite aerosol …

Unraveling Freeze-in Dark matter through the echoes of gravitational waves
Partha Konar, Sudipta Show
https://arxiv.org/abs/2506.08106 https://

Unraveling Freeze-in Dark matter through the echoes of gravitational waves
In the quest to unravel the dark sector, feebly interacting freeze-in dark matter presents an intriguing possibility, plausibly explaining the consistent null results from various dark matter experiments. We propose a unique imprint in the form of gravitational waves generated during the freeze-in production of dark matter from heavy particle decay in the early universe. This characteristic gravitational wave signature can serve as a powerful probe for freeze-in dark matter. Our study indicates…

Light-Matter Entanglement in Real-Time Nuclear-Electronic Orbital Polariton Dynamics
Millan F. Welman, Tao E. Li, Sharon Hammes-Schiffer
https://arxiv.org/abs/2506.06490

Light-Matter Entanglement in Real-Time Nuclear-Electronic Orbital Polariton Dynamics
Molecular polaritons are hybrid light-matter states that enable the exploration of potential cavity-modified chemistry. The development of dynamical, first-principles approaches for simulating molecular polaritons is important for understanding their origins and properties. Herein, we present a hierarchy of first-principles methods to simulate the real-time dynamics of molecular polaritons in the strong coupling regime. These methods are based on real-time time-dependent density functional theo…

Schwinger-Keldysh approach to tunneling transport at a hadron-quark interface
Tingyu Zhang, Hiroyuki Tajima, Motoi Tachibana
https://arxiv.org/abs/2506.09725

Schwinger-Keldysh approach to tunneling transport at a hadron-quark interface
We theoretically discuss quantum tunneling transport and frictions at a hadron-quark matter interface based on the Schwinger-Keldysh approach combined with the tunneling Hamiltonian, which has been developed in the context of condensed matter physics. In the inner core of massive neutron stars, it is expected that cold quark matter appears at sufficiently high densities and hence exhibits color superconductivity, surrounded by nucleon superfluids at lower densities. The perturbative expressions…

at this point I would just get rid of every #anker power bank regardless of whether it’s been #recalled or not, it’s only a matter of time

More than One Million Anker Power Banks Recalled Due to Fire and Burn Hazards; Manufactured by Anker Innovations
Consumers should immediately stop using the recalled power banks and contact Anker Innovations for instructions on receiving a free replacement power bank. Visit https://www.anker.com/product-recalls to register for the recall. To receive a replacement, consumers will be required to submit a photo of their recalled power bank showing the model number, serial number, their name, the date of the photograph, and the word “recalled” written on the power bank in permanent marker. A purchase rec…

I’m back to trying the #PuzzlePraise hashtag when I reply to the puzzle results of a fellow puzzler.
In my mind, this is kind of a reverse discovery tool. I, like many mutual follows, prefer to comment on the puzzles of others. No matter how unoriginal or rote it may seem, it just feels like more of a connection to me.
So, if you’re annoyed by all the back and forth that you see by v…

Revealing Dark Matter's Role in Neutron Stars Anisotropy: A Bayesian Approach Using Multi-messenger Observations
Xue-Zhi Liu, Premachand Mahapatra, Chun Huang, Ayush Hazarika, Chiranjeeb Singha, Prasanta Kumar Das
https://arxiv.org/abs/2506.08376

Revealing Dark Matter's Role in Neutron Stars Anisotropy: A Bayesian Approach Using Multi-messenger Observations
Dark matter (DM) continues to evade direct detection, but neutron stars (NSs) serve as natural laboratories where even a modest DM component can alter their structure. While many studies have examined DM effects on NSs, they often rely on specific choices of equations of state (EOS) models, assume isotropy, and lack a Bayesian statistical framework, limiting their predictive power. In this work, we present a Bayesian framework that couples pressure-anisotropic nuclear EOS to a self-interacting …

Movie idea: Under the mistaken belief that all costs were covered by a Read & Publish agreement, a researcher publishes an open access article in a journal. However, he then discovers that color figures aren’t covered, and now he owes the Cartel over 1600 Swiss francs. The chase is on as the Cartel is determined to get their hands on the money, no matter what.
#AcademicChatter…

Movie idea: Under the mistaken belief that all costs were covered by a Read & Publish agreement, a researcher publishes an open access article in a journal. However, he then discovers that color figures aren’t covered, and now he owes the Cartel over 1600 Swiss francs. The chase is on as the Cartel is determined to get their hands on the money, no matter what.
#AcademicChatter…

Movie idea: Under the mistaken belief that all costs were covered by a Read & Publish agreement, a researcher publishes an open access article in a journal. However, he then discovers that color figures aren’t covered, and now he owes the Cartel over 1600 Swiss francs. The chase is on as the Cartel is determined to get their hands on the money, no matter what.
#AcademicChatter…

Broadband Tunable Deep-UV Emission from AI-Optimized Nonlinear Metasurface Architectures
Omar A. M. Abdelraouf
https://arxiv.org/abs/2506.10442 https://

Broadband Tunable Deep-UV Emission from AI-Optimized Nonlinear Metasurface Architectures
Metasurfaces represent a pivotal advancement in nonlinear optics, leveraging high-Q resonant cavities to enhance harmonic generation. Multi-layer metasurfaces (MLMs) further amplify this potential by intensifying light-matter interactions within individual meta-atoms at the nanoscale. However, maximizing nonlinear efficiency demands extreme field confinement through optimized designs of large geometric and material parameters, which exceed traditional simulation's computational ability. To over…

Search for Primordial Black Holes from the International Space Station with the SQM-ISS detector
Francesca Liberatori, Matteo Battisti, Marco Casolino, Laura Marcelli, Zbigniew Plebaniak, Enzo Reali
https://arxiv.org/abs/2506.10246

Search for Primordial Black Holes from the International Space Station with the SQM-ISS detector
In this paper we discuss the observational capabilities and sensitivity of the SQM-ISS detector to primordial black holes. The SQM-ISS experiment aims to detect slow, non relativistic massive particles within cosmic rays, using a detector on board the International Space Station. The device is designed to recognize the passage of highly penetrating and dense particles in a wide range of mass and charge states such as Strange Quark Matter (SQM). These particles, traveling at speeds typical of gr…

"Symmetry-from-Anomaly" in Condensed Matter related Constructions
Cenke Xu
https://arxiv.org/abs/2506.09127 https://arxiv.o…

"Symmetry-from-Anomaly" in Condensed Matter related Constructions
The noninvertible axial symmetry constructed from the ABJ-anomaly has attracted enormous interest. We discuss the mechanism of "symmetry-from-anomaly" in condensed matter-related models in both 1d and 3d spaces (which correspond to (1+1)d and (3+1)d space-time). Within the models discussed here, we establish the connection between field theory quantities such as different versions of the axial charge, and quantities with simple physical meanings in our systems. In our models and likely a class …

This https://arxiv.org/abs/2209.10950 has been replaced.
link: https://scholar.google.com/scholar?q=a

DELight: a Direct search Experiment for Light dark matter with superfluid helium
To reach ultra-low detection thresholds necessary to probe unprecedentedly low Dark Matter masses, target material alternatives and novel detector designs are essential. One such target material is superfluid $^4$He which has the potential to probe so far uncharted light Dark Matter parameter space at sub-GeV masses. The new ``Direct search Experiment for Light dark matter'', DELight, will be using superfluid helium as active target, instrumented with magnetic micro-calorimeters. It is being de…

Dark matter spiral arms in Milky Way-like halos: #DarkMatter trailing galaxy arms: https://arstechnica.com/science/2025/06/simulations-find-ghostly-whirls-of-dark-matter-trailing-galaxy-arms/

Distinguishing Monochromatic Signals in LISA and Taiji: Ultralight Dark Matter versus Gravitational Waves
Heng-Tao Xu, Yue-Hui Yao, Yong Tang, Yue-Liang Wu
https://arxiv.org/abs/2506.09744

Distinguishing Monochromatic Signals in LISA and Taiji: Ultralight Dark Matter versus Gravitational Waves
Ultralight dark matter (ULDM) is an attractive candidate for cold dark matter, one of the main mysterious components of the Universe. Recent studies suggest that gravitational-wave (GW) laser interferometers can also detect bosonic ULDM fields, which would produce monochromatic signals resembling those from gravitational waves (GWs). Distinguishing between these potential origins therefore would be essential. In this work, we develop a method to address this challenge for space-based GW interfe…

Distinguishing Orbiting and Infalling Dark Matter Particles with Machine Learning
Ze'ev Vladimir, Calvin Osinga, Benedikt Diemer, Edgar M. Salazar, Eduardo Rozo
https://arxiv.org/abs/2506.09146

Distinguishing Orbiting and Infalling Dark Matter Particles with Machine Learning
Dark matter halos are typically defined as spheres that enclose some overdensity, but these sharp, somewhat arbitrary boundaries introduce non-physical artifacts such as backsplash halos, pseudo-evolution, and an incomplete accounting of halo mass. A more physically motivated alternative is to define halos as the collection of particles that are physically orbiting within their potential well. However, existing methods to classify particles as orbiting or infalling suffer from trade-offs betwee…

We are now at the point where our government is literally terrorizing tens of millions of hard working Americans as a matter of strategy.
What can we do?
Call your Senators and Rep and demand they fight Trump’s insane and illegal escalation of the past few days.
Contact your local party and Dems and encourage them to hold solidarity press conferences defending the State of California
as this escalation/attack is not just on California and Los Angeles
- it is …

Born to be Starless: Revisiting the Missing Satellite Problem
Seyoung Jeon, Sukyoung K. Yi, Emanuele Contini, Yohan Dubois, San Han, Katarina Kraljic, Sebastien Peirani, Christophe Pichon, Jinsu Rhee
https://arxiv.org/abs/2506.09152

Born to be Starless: Revisiting the Missing Satellite Problem
The massive Local Group galaxies both host substantially fewer satellites than the subhalos expected from the cold dark matter paradigm, and the recent investigations have highlighted the interplay between baryons and dark matter. We investigate the processes that make subhalos starless, using high-resolution cosmological simulations. We found that the number of satellites around Milky Way analogs closely aligns with observations, which accords with recent studies. In our simulations, the major…

Sources: Meta agrees to take a 49% stake in Scale AI for $14.8B, in a deal that gives cash to Scale's shareholders and makes Alexandr Wang a top Meta executive (Cory Weinberg/The Information)
https://www.theinformation.com/articles/me

Meta to Pay Nearly $15 Billion for Scale AI Stake and Startup’s 28-Year-Old CEO
Meta has agreed to take a 49% stake in data labeling firm Scale AI for $14.8 billion, two people familiar with the matter said. The unusual deal will be structured so Meta will send the cash to Scale’s existing shareholders and place the startup’s CEO, Alexandr Wang, in a top position inside ...

Dark Matter and CP Violation in Some Symmetry-Constrained 3HDMs
Anton Kun\v{c}inas
https://arxiv.org/abs/2506.08197 https://arxiv.org…

Dark Matter and CP Violation in Some Symmetry-Constrained 3HDMs
Multi-Higgs-doublet models can accommodate a dark matter candidate. An underlying symmetry not only ensures the candidate's stability but also helps control the number of free parameters. We consider two scenarios. First, we explore dark matter candidates in the $S_3$-symmetric three-Higgs-doublet model. Notably, our findings reveal that the cases we discuss allow for different dark matter mass ranges compared to other candidates within three-Higgs-doublet models. Additionally, we investigate a…

syren-baryon: Analytic emulators for the impact of baryons on the matter power spectrum
Lukas Kammerer, Deaglan J. Bartlett, Gabriel Kronberger, Harry Desmond, Pedro G. Ferreira
https://arxiv.org/abs/2506.08783

syren-baryon: Analytic emulators for the impact of baryons on the matter power spectrum
Baryonic physics has a considerable impact on the distribution of matter in our Universe on scales probed by current and future cosmological surveys, acting as a key systematic in such analyses. We seek simple symbolic parametrisations for the impact of baryonic physics on the matter power spectrum for a range of physically motivated models, as a function of wavenumber, redshift, cosmology, and parameters controlling the baryonic feedback. We use symbolic regression to construct analytic approx…

Transport of soft matter in complex and confined environments
Joshua D Mcgraw (IPGG)
https://arxiv.org/abs/2506.05884 https://arxiv.o…

Transport of soft matter in complex and confined environments
Brownian motion provides a bedrock for the understanding of soft condensed matter and, therefore, of the physical description of the microscopic biological world. Inspired by this domain, and combining softness with hydrodynamic energy inputs, new physical modes of nanoscale organization and transport may now be accessible.

Anisotropic quantum polytropes
Hermano Velten, Felipe S. Esc\'orcio, Nadson J. S. Trindade
https://arxiv.org/abs/2506.08135 https://

Anisotropic quantum polytropes
The structure of astrophysical objects is usually modeled under the assumption of hydrostatic equilibrium. However, actual configurations may deviate from perfect spherical or isotropic properties. Consequently, cosmic objects are expected to exhibit some degree of anisotropy. This consideration also extends to hypothetical dark structures, such as dark stars and dark matter halos. Although the nature of dark matter remains unknown, axion-like particles (ALPs) are strong candidates, suggesting …

Spatial and Pulse Efficiency Constraints in Atom Interferometric Gravitational Wave Detectors
Patrik Schach, Enno Giese
https://arxiv.org/abs/2506.09511 ht…

Spatial and Pulse Efficiency Constraints in Atom Interferometric Gravitational Wave Detectors
Currently planned and constructed terrestrial detectors for gravitational waves and dark matter based on differential light-pulse atom interferometry are designed around three primary strategies to enhance their sensitivity: (i) Resonant-mode enhancement using multiple diamonds, (ii) large-momentum-transfer techniques to increase arm separation within the interferometer, and (iii) very-long baseline schemes that increase the distance between the two interferometers. Both resonant-mode enhanceme…

Thermal corrections to dark matter annihilation with real photon emission/absorption
Prabhat Butola (IMSc, HBNI), D. Indumathi (IMSc, HBNI), Pritam Sen (TIFR)
https://arxiv.org/abs/2506.07663

Thermal corrections to dark matter annihilation with real photon emission/absorption
The dark matter relic density is being increasingly precisely measured. This relic density is theoretically determined by a Boltzmann equation which computes the dark matter distribution according to the (thermally averaged) cross section for annihilation/production of dark matter within a given model. We present here the complete higher order thermal corrections, calculated using real time thermal field theory, to the cross section for the annihilation of dark matter into Standard Model fermio…

Dark Matter Haloscope with a Disordered Dielectric Absorber
Stewart Koppell, Otavio D. A. R. Bittencourt, Dip Joti Paul, Junwu Huang, Masha Baryakhtar, Karl K. Berggren
https://arxiv.org/abs/2506.00115

Dark Matter Haloscope with a Disordered Dielectric Absorber
Light dark matter candidates such as axions and dark photons generically couple to electromagnetism, yielding dark-matter-to-photon conversion as a key search strategy. In addition to resonant conversion in cavities and circuits, light dark matter bosons efficiently convert to photons on material interfaces, with a broadband power proportional to the total area of these interfaces. In this work, we make use of interface conversion to develop a new experimental dark matter detector design: the d…

Constraining Dark Matter Parameters in the Lambda-CDM Framework: A Bayesian Comparison of Planck and DES Constraints
Manjeet Kunwar, Nabin Bhusal, Manil Khatiwada, Niraj Dhital
https://arxiv.org/abs/2506.07133

Constraining Dark Matter Parameters in the Lambda-CDM Framework: A Bayesian Comparison of Planck and DES Constraints
We present a Bayesian analysis of cosmological parameter constraints from early- and late-universe observations, focusing on the matter density parameter ($Ω_m$) and the amplitude of matter fluctuations ($σ_8$) within the $Λ$CDM framework. Using data from the Planck 2018 satellite mission and the Dark Energy Survey (DES) Year 3, we compute theoretical predictions for angular and matter power spectra via Boltzmann solvers and perform Markov Chain Monte Carlo (MCMC) sampling using the \texttt{…

Bulk Viscosity of Two-Flavor Color Superconducting Quark Matter in Neutron Star Mergers
Mark Alford, Arus Harutyunyan, Armen Sedrakian, Stefanos Tsiopelas
https://arxiv.org/abs/2506.08144

Bulk Viscosity of Two-Flavor Color Superconducting Quark Matter in Neutron Star Mergers
This work investigates the bulk viscosity of warm, dense, neutrino-transparent, color-superconducting quark matter, where damping of density oscillations in the kHz frequency range arises from weak-interaction-driven direct Urca processes involving quarks. We study the two-flavor red-green paired color-superconducting (2SC) phase, while allowing for the presence of unpaired strange quarks and blue color light quarks of all flavors. Our calculations are based on the SU(3) Nambu-Jon…

"For Glory's Sake - For Vengeance Sake - War"
The predicate is being laid.
There’s a very easy A to B if, after a day or two or three, you don’t see the violence stop,
you could imagine easily that Trump would use that as a pretext for a much more sweeping assertion of power.
So we are at a very, very dangerous time.
The rhetoric is maximal rhetoric. The deployment is relatively minimal, but I’m worried it’s only a matter of time before the depl…

Opinion | Three Opinion Writers on the L.A. Protests and Trump’s Spectacle of Control
Michelle Cottle, David French and Tressie McMillan Cottom dissect Trump’s reach for power.

Deep Neural Networks Hunting Ultra-Light Dark Matter
Pavel K\r{u}s, Diana L\'opez Nacir, Federico R. Urban
https://arxiv.org/abs/2506.04100 https://

Deep Neural Networks Hunting Ultra-Light Dark Matter
Ultra-light dark matter (ULDM) is a compelling candidate for cosmological dark matter. If ULDM interacts with ordinary matter, it can induce measurable, characteristic signals in pulsar-timing data because it causes the orbits of pulsars in binary systems to osculate. In this work, we investigate the potential of machine learning (ML) techniques to detect such ULDM signals. To this end, we construct three types of neural networks: an autoencoder, a binary classifier, and a multiclass classifier…

Matter symmetries in supersymmetric standard models from non-invertible selection rules
Tatsuo Kobayashi, Hironobu Mita, Hajime Otsuka, Riku Sakuma
https://arxiv.org/abs/2506.10241

Matter symmetries in supersymmetric standard models from non-invertible selection rules
We discuss phenomenological implications of non-invertible selection rules in the framework of the supersymmetric standard model. We find that a remnant $\mathbb{Z}_2$ symmetry of fusion algebras which holds at all-loop order plays the role of $R$-parity, forbidding baryon and lepton violating operators. In addition, a combination of Standard Model gauge symmetry and the non-invertible selection rules lead to baryon triality and proton hexality that can protect the proton from decay. In general…

This https://arxiv.org/abs/2501.13861 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Study of Various Dark Matter Halo Profiles in Milky Way and M31 Galaxies within the Standard Cosmology Framework
In this paper, we study the rotation curves of the Milky Way galaxy (MW) and Andromeda galaxy (M31) by considering their bulge, disk, and halo components. We model the bulge region by the widely accepted de Vaucouleur's law and the disk region by the well-established exponential profile. In order to understand the distribution of dark matter in the halo region, we consider three different dark matter profiles in the framework of the standard $Λ$CDM model, namely, Navarro-Frenk-White (NFW), Her…

Multi-band observation of lensed gravitational waves as a probe of small-mass dark matter halos
Katsuya T. Abe, Shun Arai, Ryoto Inui, Hirotaka Yarimoto, Takahiro S. Yamamoto, Shuichiro Yokoyama
https://arxiv.org/abs/2506.07507

Multi-band observation of lensed gravitational waves as a probe of small-mass dark matter halos
The gravitational lensing effect of gravitational waves (GWs) has been extensively discussed as a probe of small-mass dark matter halos, which can provide missing information about dark matter. We propose a multi-band observation of lensed GWs from a compact binary to observe both geometrical optics (GO) and wave optics (WO) effects from the same source. This method is expected to be advantageous in breaking parameter degeneracies between a GW source and a dark matter halo acting as a lens. We …

Quasi-normal modes and echoes of generalized black hole bounces and their correspondence with shadows
Albert Duran-Cabac\'es, Diego Rubiera-Garcia, Diego S\'aez-Chill\'on G\'omez
https://arxiv.org/abs/2506.10814

Quasi-normal modes and echoes of generalized black hole bounces and their correspondence with shadows
We study the quasi-normal modes (QNMs) of a family of generalized black bounces interpolating between regular black holes and traversable wormhole solutions according to a single extra parameter $a$. Firstly, working with a generic spherically symmetric space-time with arbitrary radial function and an anisotropic fluid matter source, the general equations for the gravitational waves are obtained. Then, we focus on such particular space-time metric and use the time-domain method to find the evol…

[2025-06-13 Fri (UTC), 5 new articles found for cond-mat.soft Soft Condensed Matter]
toXiv_bot_toot

Cosmological Histories in Neutrino Portal Dark Matter
Amro E. B. Abdelrahim, Brian Batell, Joshua Berger, David McKeen, Barmak Shams Es Haghi
https://arxiv.org/abs/2506.09137

Cosmological Histories in Neutrino Portal Dark Matter
We explore the diverse cosmological histories of a dark sector that is connected to the Standard Model (SM) via a Dirac sterile neutrino. The dark sector consists of a complex scalar and a Dirac fermion dark matter (DM) candidate protected by a global $U(1)$ stabilizing symmetry. Assuming the dark sector has negligible initial abundance and is populated from reactions in the SM thermal plasma during the radiation era, we show that the cosmological histories of the dark sector fall into four qua…

Heavy-heavy and heavy-light mesons in cold nuclear matter
J. J. Cobos-Mart\'inez, Guilherme N. Zeminiani, Kazuo Tsushima
https://arxiv.org/abs/2506.08946

Heavy-heavy and heavy-light mesons in cold nuclear matter
We review the in-medium modifications of effective masses (Lorentz scalar potentials or phenomenon of mass shift) of heavy-heavy and heavy-light mesons in symmetric nuclear matter and their nuclear bound states. We use a combined approach with the quark-meson coupling (QMC) model and an effective Lagrangian. As demonstrated by the cases of pionic and kaonic atoms, studies of meson-nucleus bound state can provide us with important information on chiral symmetry in dense nuclear medium. In this r…

Spin alignment of Quarkonia: A Possible Probe of a Deconfined QCD matter in Heavy-ion Collisions at TeV Energies
Bhagyarathi Sahoo, Captain R. Singh, Raghunath Sahoo
https://arxiv.org/abs/2506.09405

Spin alignment of Quarkonia: A Possible Probe of a Deconfined QCD matter in Heavy-ion Collisions at TeV Energies
In this study, we investigate the influence of deconfined QCD matter on quarkonium spin alignment in ultra-relativistic heavy-ion collisions. We estimate the spin alignment of charmonium ($J/ψ$, and $ψ$(2S)) and bottomonium ($Υ$(1S), and $Υ$(2S)) states by calculating the energy eigenvalues in a thermal rotating medium. We solve the Schrödinger equation with a medium-modified color-singlet potential considering the coupling of spin with vorticity and magnetic field. Furthermore, we evaluat…

The Trump administration is preparing to begin the transfer of potentially thousands of foreigners who are in the United States illegally
to the U.S. military base in Guantšnamo Bay, Cuba,
starting as early as this week,
said U.S. officials familiar with the matter.

The foreign nationals under consideration hail from a range of countries.
They include hundreds from friendly European nations, including Britain, Italy, France, Germany, Ireland, Belgium, the Nethe…

Trump to ramp up transfers to Guantánamo, including citizens of allies
The administration aims to send thousands of foreigners to Guantánamo, including people from Britain and France, with no plans to notify their home governments.

Replaced article(s) found for astro-ph.HE. https://arxiv.org/list/astro-ph.HE/new/
[1/1]:
Unraveling Trace Anomaly of Supradense Matter via Neutron Star Compactness Scaling

Kinetically Coupled Dark Matter Condensates
Michael W. Toomey, Savvas M. Koushiappas, Stephon Alexander
https://arxiv.org/abs/2506.08076 https://

Kinetically Coupled Dark Matter Condensates
Dark matter consisting of ultralight bosons can form a macroscopic Bose-Einstein condensate with distinctive observational signatures. While this possibility has been extensively studied for axions and axion-like particles $-$ pseudoscalars with masses protected by shift symmetry $-$ realistic models from string theory and other higher-dimensional theories predict more complex structures. Here we investigate a two-field generalization where an axion couples to a moduli field through its kinetic…

Shape Shifting Light Dark Matter Solitons
Dor Ben-Amotz
https://arxiv.org/abs/2506.01282 https://arxiv.org/pdf/2506.01282

Shape Shifting Light Dark Matter Solitons
Dark matter consisting of a Bose-Einstein-Condensate (BEC) of ultra-light particles is predicted to have a soliton shape that shifts with the dark matter mass fraction in galaxies with a centrally localized stellar mass (such as a black hole). In the self-gravitating dark matter limit, the predicted cored soliton shape is consistent with previous numerical predictions and analytical approximations. As the dark matter mass fraction decreases, the soliton is predicted to become increasingly cusp …

The Highest-Energy Neutrino Event Constrains Dark Matter-Neutrino Interactions
Toni Bert\'olez-Mart\'inez, Gonzalo Herrera, Pablo Mart\'inez-Mirav\'e, Jorge Terol Calvo
https://arxiv.org/abs/2506.08993

The Highest-Energy Neutrino Event Constrains Dark Matter-Neutrino Interactions
Dark Matter-neutrino interactions affect the propagation of astrophysical neutrinos, attenuating the flux of neutrinos arriving at Earth. Using the highest-energy neutrino event detected to date by the KM3NeT collaboration as an example, and assuming an extragalactic origin, we derive limits on these interactions at $E_ν= 220^{+570}_{-110}\, \mathrm{PeV}$. Considering only the propagation on the Milky Way Dark Matter halo, we constrain the interaction cross section over the mass of the Dark Ma…

Could Planck Star Remnants be Dark Matter?
Oem Trivedi, Abraham Loeb
https://arxiv.org/abs/2506.03334 https://arxiv.org/pdf/2506.0333…

Could Planck Star Remnants be Dark Matter?
We explore the end state of gravitational collapse under quantum gravity effects and propose that Planck Star Remnants (PSR), formed via nonsingular bounces, could serve as viable dark matter candidates. Within the framework of Loop Quantum Cosmology, we model the collapse of a homogeneous matter distribution and show that the classical singularity is replaced by a quantum bounce at the Planck density. By analytically matching the Friedmann Lemaitre Robertson Walker (FLRW) interior to an exteri…

Symmetry energy and neutron matter equation of state at $\rho_0/3$ from the electric dipole polarizability in $^{48}$Ca, $^{68}$Ni and $^{208}$Pb
Mengying Qiu, Lie-Wen Chen, Zheng Zheng Li, Yi Fei Niu, Zhen Zhang
https://arxiv.org/abs/2506.08778

Symmetry energy and neutron matter equation of state at $ρ_0/3$ from the electric dipole polarizability in $^{48}$Ca, $^{68}$Ni and $^{208}$Pb
Based on the quasiparticle random phase approximation implemented via the finite amplitude method, we employ a set of representative relativistic mean-field models to investigate the sensitivity of the inverse electric dipole polarizability $1/α_{\mathrm{D}}$ in $^{48}\mathrm{Ca}$, $^{68}\mathrm{Ni}$, and $^{208}\mathrm{Pb}$ to the symmetry energy $E_{\rm{sym}}(ρ)$ and the neutron matter equation of state $E_{\rm{PNM}}(ρ)$ at a subsaturation density of $ρ= ρ_0/3$. Combined with predictions…

Two coincidences are a clue: Probing a GeV-scale dark QCD sector
Yi Chung
https://arxiv.org/abs/2506.10928 https://arxiv.org/pdf/2506…

Two coincidences are a clue: Probing a GeV-scale dark QCD sector
The similarity between dark matter and baryon energy densities suggests the existence of a dark sector analogous to the visible QCD sector. In addition, small-scale structure issues can be addressed by dark matter self-interactions with a cross section comparable to that of QCD. Both observations point to a GeV-scale dark QCD sector. In this letter, guided by these two coincidences, we investigate how a chiral dark QCD model with a MeV-scale dark photon can resolve the core-cusp problem. A pote…

Locating the QCD critical point with neutron-star observations
Christian Ecker, Niko Jokela, Matti J\"arvinen
https://arxiv.org/abs/2506.10065 https:/…

Locating the QCD critical point with neutron-star observations
We present a probabilistic model for the QCD critical endpoint (CEP) and the equation of state (EOS) at $β$-equilibrium, constrained by neutron-star observations. Using a hybrid framework that combines the holographic V-QCD model with an effective van der Waals description of nuclear matter, we generate a large ensemble of EOSs incorporating nuclear theory uncertainties. Constraining this ensemble with neutron-star mass-radius data and tidal deformability measurements from gravitational waves,…

Characterizing gas flows through observations of the disk-CGM interface with the HWO
Sanchayeeta Borthakur, Joseph N. Burchett, Frances Cashman, Andrew J. Fox, Yong Zheng, David M. French, Rongmon Bordoloi, Brad Koplitz
https://arxiv.org/abs/2506.10517

Characterizing gas flows through observations of the disk-CGM interface with the HWO
How gas gets into, through, and out of galaxies is critical to understanding galactic ecosystems. The disk-CGM interface region is uniquely suited for studying processes that drive gas flows. Matter and energy that enter and leave a galaxy pass through this region; however, the precise pathways are yet to be explored. In this paper, we discuss future observations that will facilitate the discovery of the gas flow pathways in galaxies and the telescope parameters necessary for making those obser…

To collapse or not to collapse: Halo evolution with self-interacting dark matter mass segregation
Yashraj Patil, Moritz S. Fischer
https://arxiv.org/abs/2506.06272

To collapse or not to collapse: Halo evolution with self-interacting dark matter mass segregation
Surprisingly compact substructures in galaxies and galaxy clusters, but also field halos, have been observed by gravitational lensing. They could be difficult to explain with collisionless dark matter (DM). To explain those objects, recent studies focused on the gravothermal collapse that halos consisting of self-interacting dark matter (SIDM) can undergo. However, simple models of elastic scattering could face problems explaining those compact objects during very later stages of the collapse a…

U.S. health officials have changed their advice to international travelers about measles,
saying that Americans should be vaccinated against the virus
-- no matter where they’re going.
U.S. residents are recommended to get measles-mumps-rubella shots, anyway.
But the Centers for Disease Control and Prevention previously emphasized the importance of vaccination for travelers going to countries with outbreaks.

All international travelers should get measles vaccinations, CDC says
U.S. health officials have changed their advice to international travelers about measles, saying Americans should be vaccinated against the disease no matter where they travel in the world. U.S. residents are recommended to get measles-mumps-rubella shots, anyway. But the Centers for Disease Control and Prevention previously emphasized the importance of vaccination for travelers going to countries with outbreaks. Last week, the CDC updated its guidance to call for vaccinations for travelers goi…

Dense matter in a holographic hard-wall model of QCD
Daisuke Fujii, Atsushi Hosaka, Akihiro Iwanaka, Tadakatsu Sakai, Motoi Tachibana
https://arxiv.org/abs/2506.06997

Dense matter in a holographic hard-wall model of QCD
A deeper understanding of QCD matter at strong coupling remains challenging due to its non-perturbative nature. To this end, we study a two-flavor holographic hard-wall model to investigate the properties of QCD at finite-density and zero temperature with a nonvanishing quark mass. A dense matter phase is described by a classical solution of the equations of motion in a homogeneous Ansatz. We apply holographic renormalization to formulate the holographic dictionary that relates UV boundary data…

Kinematic Confirmation of a Remarkable Linear Trail of Galaxies in the NGC 1052 Field, Consistent with Formation in a High-Speed Bullet Dwarf Collision
Michael A. Keim, Pieter van Dokkum, Zili Shen, Harrison Souchereau, Imad Pasha, Shany Danieli, Roberto Abraham, Aaron J. Romanowsky, Yimeng Tang
https://arxiv.org/abs/2506.10220

Kinematic Confirmation of a Remarkable Linear Trail of Galaxies in the NGC 1052 Field, Consistent with Formation in a High-Speed Bullet Dwarf Collision
A unique linear trail of diffuse galaxies was recently identified in the NGC 1052 field. This trail includes the remarkable, ultra-diffuse galaxies DF2 and DF4 which lack dark matter and host unusually luminous globular clusters. It has been proposed that the trail formed via a high-speed collision between two gas-rich dwarf galaxies. This scenario predicts that the trail galaxies are kinematically connected and follow a specific trend in radial velocity as a function of position, based on the …

Computing Nonlinear Power Spectra Across Dynamical Dark Energy Model Space with Neural ODEs
Peter L. Taylor
https://arxiv.org/abs/2506.09128 https://

Computing Nonlinear Power Spectra Across Dynamical Dark Energy Model Space with Neural ODEs
I show how to compute the nonlinear power spectrum across the entire $w(z)$ dynamical dark energy model space. Using synthetic $Λ$CDM data, I train a neural ordinary differential equation (ODE) to infer the evolution of the nonlinear matter power spectrum as a function of the background expansion and mean matter density across $\sim$$9 {\rm \ Gyr}$ of cosmic evolution. After training, the model generalises to {\it any} dynamical dark energy model parameterised by $w(z)$. With little optimisati…

Parametric Coincidence in the Baryon to Dark Matter Ratio from Affleck-Dine Baryogenesis and UV Freeze-in Dark Matter
Jae Hyeok Chang, Chang Sub Shin, James Unwin
https://arxiv.org/abs/2506.03269

Parametric Coincidence in the Baryon to Dark Matter Ratio from Affleck-Dine Baryogenesis and UV Freeze-in Dark Matter
We highlight that the observed concurrence between the baryon and dark matter relic densities can be explained via a parametric coincidence between two distinct production mechanisms: Affleck-Dine baryogenesis and dark matter UV freeze-in. In the Affleck-Dine mechanism, the baryon asymmetry is naturally proportional to the inflationary reheating temperature $T_{\rm rh}$, which also plays a critical role in setting the relic abundance of UV freeze-in dark matter. Since Affleck-Dine baryogenesis …

Probing Ultralight Axion-like Dark Matter $-$ A PTA-PPA Synergy
Ximeng Li, Yonghao Liu, Zu-Cheng Chen, Shi Dai, Boris Goncharov, Xiao-Song Hu, Qing-Guo Huang, Tao Liu, Jing Ren, Yu-Mei Wu, Xiao Xue, Xingjiang Zhu
https://arxiv.org/abs/2506.04871

Probing Ultralight Axion-like Dark Matter $-$ A PTA-PPA Synergy
Ultralight axion-like dark matter (ALDM) is a leading candidate in the dark matter realm, characterized by its prominent wave properties on astronomical scales. Pulsar Timing Arrays (PTAs) and Pulsar Polarization Arrays (PPAs) aim to detect this dark matter through timing and polarization measurements, respectively, of pulsars. The PTA relies on gravitational effects, as the ALDM halo perturbs the spacetime metric within the Milky Way, while the PPA detects non-gravitational effects, namely cos…

Power Spectrum Emulators from Neural Networks and Tree-Based Methods
Andrei Lazanu
https://arxiv.org/abs/2506.07514 https://arxiv.org…

Power Spectrum Emulators from Neural Networks and Tree-Based Methods
We use two subsets of 2000 and 1000 \textsc{Quijote} simulations to build two power spectrum emulators, allowing for fast computations of the non-linear matter power spectrum. The first emulator works on scales $k \in [0.015,1.8]\,h/ \rm{Mpc^{-1}}$ in terms of seven cosmological parameters: the matter and baryon fraction of the energy density of the Universe $Ω_m$ and $Ω_b$, the reduced Hubble constant $h$, the scalar spectral index $n_s$, the amplitude of matter density fluctuations $σ_8$, …

New Types of Hydrogenlike matter Composed of Electron(s) and Meson(s)
Jun-Feng Wang, Zi-Yue Cui, Cheng-Qun Pang, Zhi-Feng Sun
https://arxiv.org/abs/2506.06983

New Types of Hydrogenlike matter Composed of Electron(s) and Meson(s)
In the present work, we predict the existence of new types of hydrogenlike matter, including hydrogenlike atoms ($π^+e^-$, $K^+e^-$, $D^+e^-$), hydrogenlike molecular ions ($π^+π^+e^-$, $K^+K^+e^-$, $D^+D^+e^-$) and hydrogenlike molecules ($π^+π^+e^-e^-$, $K^+K^+e^-e^-$, $D^+D^+e^-e^-$). By solving the Schrödinger equation, the binding energy of hydrogenlike atoms is obtained as $E_n=-\frac{1}{2n^2}$. For hydrogenlike molecular ions and molecules, the variational method is employed to cal…

Torsion Balance Experiments Enable Direct Detection of Sub-eV Dark Matter
Shigeki Matsumoto, Jie Sheng, Chuan-Yang Xing, Lin Zhu
https://arxiv.org/abs/2506.07763

Torsion Balance Experiments Enable Direct Detection of Sub-eV Dark Matter
Light dark matter with sub-eV masses has a high number density in our galaxy, and its scattering cross section with macroscopic objects can be significantly enhanced by coherence effects. Repeated scattering with a target object can induce a measurable acceleration. Torsion balance experiments with geometric asymmetry are, in principle, capable of detecting such signals. Our analysis shows that existing torsion balances designed to test the Equivalence Principle already place the most stringent…

Accurately simulating core-collapse self-interacting dark matter halos
Moritz S. Fischer, Hai-Bo Yu, Klaus Dolag
https://arxiv.org/abs/2506.06269 https://

Accurately simulating core-collapse self-interacting dark matter halos
The properties of satellite halos provide a promising probe for dark matter (DM) physics. Observations motivate current efforts to explain surprisingly compact DM halos. If DM is not collisionless but has strong self-interactions, halos can undergo gravothermal collapse, leading to higher densities in the central region of the halo. However, it is challenging to model this collapse phase from first principles. To improve on this, we seek to better understand numerical challenges and convergence…

Diffuse astrophysical neutrinos from dark matter around blazars
Andrea Giovanni De Marchi, Alessandro Granelli, Jacopo Nava, Filippo Sala
https://arxiv.org/abs/2506.06416

Diffuse astrophysical neutrinos from dark matter around blazars
Neutrinos from blazars can originate from inelastic scatterings between protons within their jets and sub-GeV dark matter (DM) around them, explaining IceCube detections of neutrinos from TXS 0506+056 that are otherwise challenging for models of its jet. In this paper we calculate such DM-induced high-energy neutrinos, from TXS 0506+056 as well as from a stacked blazar sample, in the four cases where DM-quark interactions are mediated by a new massive vector, axial, scalar, and pseudoscalar par…

Freeze-in production of scalaron dark matter in $f(R)$ gravity
Basabendu Barman, Ashmita Das, Rakesh Kumar SivaKumar, Rudra Pratap Udgata
https://arxiv.org/abs/2506.06436

Freeze-in production of scalaron dark matter in $f(R)$ gravity
We demonstrate that the scalaron, a scalar degree of freedom, emerging from the $f(R)$ theory of gravity, can account for the observed dark matter (DM) abundance if its mass is around the MeV scale, to ensure its cosmological stability. Focusing on two well-known $f(R)$ gravity models, we systematically show that if scalaron production proceeds via the freeze-in mechanism, the right relic abundance is satisfied over a very narrow window of reheating temperature $10^{14}\lesssim T_{\rm rh}\lesss…

Indirect Detection of Dark Matter Around a Supermassive Black Hole with High Energy-Resolution Gamma-Ray Telescopes
Yu Watanabe, Alexander Kusenko, Shigeki Matsumoto
https://arxiv.org/abs/2506.07009

Indirect Detection of Dark Matter Around a Supermassive Black Hole with High Energy-Resolution Gamma-Ray Telescopes
We explore whether the unprecedented energy resolution of upcoming gamma-ray telescopes can uncover relativistic effects in photon spectra resulting from dark matter (DM) annihilation or decay near the supermassive black hole (SMBH) at the Galactic Center (GC), specifically, gravitational redshift, Doppler broadening due to Lorentz boosts, and kinetic energy enhancements arising from high DM velocities. By modeling DM density and velocity profiles under various SMBH formation scenarios and DM p…

A novel test of gravity: Does spacetime geometry track matter density?
Camille Bonvin, Nastassia Grimm, Isaac Tutusaus
https://arxiv.org/abs/2506.04387 htt…

A novel test of gravity: Does spacetime geometry track matter density?
We propose a novel test of gravity that combines galaxy clustering with gravitational lensing. In general relativity, the evolution of matter density fluctuations and of the Weyl potential -- the sum of spatial and temporal distortions of the geometry -- are governed by the same growth function. In contrast, alternative theories of gravity that modify the relation between geometry and matter content can lead to differences in these two growths. Exploiting a recent method to directly measure the…

This https://arxiv.org/abs/2411.09762 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Efficient Quantum Simulation of QCD Jets on the Light Front
Quark and gluon jets provide one of the best ways to probe the matter produced in ultrarelativistic high-energy collisions, from cold nuclear matter to hot quark-gluon plasma. In this work, we propose a unified framework for efficient quantum simulation of many-body dynamics using the (3+1)-dimensional QCD Hamiltonian on the light front, particularly suited for studying the scattering of quark and gluon jets on nuclear matter in heavy-ion collisions. We describe scalable methods for mapping phy…

This https://arxiv.org/abs/2410.02676 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Matter power spectrum induced by primordial magnetic fields: from the linear to the non-linear regime
Linear theory predicts that primordial magnetic fields (PMFs) enhance the matter power spectrum on small scales. However, the linear approximation breaks down on sufficiently small scales where PMF-induced baryon perturbations back-react onto the magnetic fields. Previous studies assumed that the baryon power spectrum would be sharply suppressed in this non-linear regime, based on arguments related to the magnetic Jeans scale. For the first time, we perform dedicated magnetohydrodynamic (MHD) s…

Quantum cosmological perturbations in bouncing models with mimetic dark matter
Idaiane L. Machado, D\^eivid R. da Silva, Nelson Pinto-Neto
https://arxiv.org/abs/2506.06901

Quantum cosmological perturbations in bouncing models with mimetic dark matter
We calculate the power spectrum of cosmological perturbations originated from quantum vacuum fluctuations in bouncing scenarios proposed in Ref.~\cite{chamseddine2014cosmology} in the framework of mimetic cosmology. We show that all physically relevant models produce scale invariant spectral indices, and amplitudes compatible with observations provided that the bounce occurs at length scales $t_0$ inside the physically reasonable interval $10^5 l_p < t_0 < 10^9 l_p$. We also show that by slight…

This https://arxiv.org/abs/2305.08943 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Cosmology of Single Species Hidden Dark Matter
Cosmology and astrophysics provide various ways to study the properties of dark matter even if they have negligible non-gravitational interactions with the Standard Model particles and remain hidden. We study a type of hidden dark matter model in which the dark matter is completely decoupled from the Standard Model sector except gravitationally, and consists of a single species with conserved comoving particle number and conserved comoving entropy. This category of hidden dark matter includes m…

Electric conductivity and flavor diffusion in a viscous, resistive quark-gluon plasma for weak and strong magnetic fields
Ferdinando Frasc\`a, Andrea Beraudo, Luca Del Zanna
https://arxiv.org/abs/2506.10783

Electric conductivity and flavor diffusion in a viscous, resistive quark-gluon plasma for weak and strong magnetic fields
We present a microscopic calculation of the electric conductivity and net-particle diffusion coefficients for a viscous and resistive ultra-relativistic plasma. Our results might be of interest for several astrophysical and cosmological problems, but the main physical application we have in mind is the hot deconfined matter produced in relativistic heavy-ion collisions. Accordingly, as charged particles of the medium we take three species (flavors) of light (massless for the sake of simplicity)…

This https://arxiv.org/abs/2411.05065 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Gravitational Waves from Primordial Black Hole Dark Matter Spikes
The origin of the binary black hole mergers observed by LIGO--Virgo--KAGRA remains an open question. We calculate the merger rate from primordial black holes (PBHs) within the density spike around supermassive black holes (SMBHs) at the centers of galaxies. We show that the merger rate within the spike is comparable to that within the wider dark matter halo. We also calculate the extreme mass ratio inspiral (EMRI) signal from PBHs hosted within the density spike spiralling into their host SMBHs…

Caustic fringes for wave dark matter
Andrew Eberhardt, Lam Hui
https://arxiv.org/abs/2506.02400 https://arxiv.org/pdf/2506.02400

Caustic fringes for wave dark matter
Wave dark matter is composed of particles sufficiently light that their de Broglie wavelength exceeds the average inter-particle separation. A typical wave dark matter halo exhibits granular substructures due to wave interference. In this paper, we explore the wave interference effects around caustics. These are locations of formally divergent density in cold collisionless systems. Examples include splashback in galaxy clusters, and tidal shells in merging galaxies, where the pile-up of dark ma…

This https://arxiv.org/abs/2408.03364 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Long-lived particle phenomenology in one-loop neutrino mass models with dark matter
Neutrino masses and dark matter (DM) might have a common origin. The scotogenic model can be considered the proto-type model realizing this idea, but many other variants exist. In this paper we explore the phenomemology of a particular DM neutrino mass model, containing a triplet scalar. We calculate the relic density and check for constraints from direct detection experiments. The parameter space of the model, allowed by these constraints, contains typically a long-lived or quasi-stable doubly…

Non-Separable Halo Bias from High-Redshift Galaxy Clustering
Emy Mons, Vipul Prasad Maranchery, M. S. Suryan Sivadas, Charles Jose
https://arxiv.org/abs/2506.07662

Non-Separable Halo Bias from High-Redshift Galaxy Clustering
The halo model provides a powerful framework for interpreting galaxy clustering by linking the spatial distribution of dark matter haloes to the underlying matter distribution. A key assumption within the linear bias approximation of the halo model is that the halo bias between two halo populations is a separable function of the mass of each population. In this work, we test the validity of the separable bias approximation on quasi-linear scales using both simulations and observational data. Un…

This https://arxiv.org/abs/2502.13002 has been replaced.
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Inverse Seesaw Mechanism and Axion Portal Fermionic Dark Matter
We propose a minimal extension of the Standard Model (SM) that addresses both the smallness of neutrino masses and the dark matter (DM) puzzle via the inverse seesaw mechanism and an axion portal fermionic DM. This model generates light neutrino masses without requiring high energy scales, enhancing its testability in future collider experiments. An axion-like particle (ALP) connects the SM and DM sectors, yielding a distinct phenomenology. Our analysis shows that the model is consistent with c…

Not so dark, not so dense: an alternative explanation for the lensing subhalo in SDSSJ0946 1006
Qiuhan He, Andrew Robertson, James W. Nightingale, Aristeidis Amvrosiadis, Shaun Cole, Carlos S. Frenk, Samuel C. Lange, Shubo Li, Ran Li, Xiaoyue Cao, Leo W. H. Fung, Xianghao Ma, Richard Massey, Kaihao Wang, Maximilian von Wietersheim-Kramsta
https://

Not so dark, not so dense: an alternative explanation for the lensing subhalo in SDSSJ0946+1006
Previous studies of the strong lens system SDSSJ0946+1006 have reported a dark matter subhalo with an unusually high central density, potentially challenging the standard cold dark matter (CDM) paradigm. However, these analyses assumed the subhalo to be completely dark, neglecting the possibility that it may host a faint galaxy. In this work, we revisit the lensing analysis of SDSSJ0946+1006, explicitly modelling the subhalo as a luminous satellite. Incorporating light from the perturber broade…