Tootfinder

This https://arxiv.org/abs/2211.17157 has been replaced.
link: https://scholar.google.com/scholar?q=a

Swarm-Based Gradient Descent Method for Non-Convex Optimization
We introduce a new Swarm-Based Gradient Descent (SBGD) method for non-convex optimization. The swarm consists of agents, each is identified with a position, ${\mathbf x}$, and mass, $m$. The key to their dynamics is communication: masses are being transferred from agents at high ground to low(-est) ground. At the same time, agents change positions with step size, $h=h({\mathbf x},m)$, adjusted to their relative mass: heavier agents proceed with small time-steps in the direction of local gradien…

Russia aims to knock out Ukraine's power grid in new wave of attacks: https://benborges.xyz/2024/03/26/russia-aims-to.html

This https://arxiv.org/abs/2308.07955 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Cosmological Implications of Gauged $U(1)_{B-L}$ on $ΔN_{\rm eff}$ in the CMB and BBN
We calculate the effects of a light, very weakly-coupled boson $X$ arising from a spontaneously broken $U(1)_{B-L}$ symmetry on $ΔN_{\rm eff}$ as measured by the CMB and $Y_p$ from BBN. Our focus is the mass range $1 \; {\rm eV} \lesssim m_X \lesssim 100 \; {\rm MeV}$; masses lighter than about an ${\rm eV}$ have strong constraints from fifth-force law constraints, while masses heavier than about 100 MeV are constrained by other probes. We do not assume $X$ began in thermal equilibrium with th…

The world's biggest blueberry. Behold this absolute unit of a handfruit
https://mossandfog.com/the-worlds-biggest-blueberry-is-70-times-heavier-than-most

... and decided to get a bit heavier than usual!
#TOTP

I just got two tubs of homemade chilli from the freezer, and one felt heavier to me than the other.
Just to confirm, I weighed them both.
The one that felt heavier to me was 782.1g
The one that felt lighter to me was 781.4g
So, have I developed the ability to detect less than 1g difference in the weight of given objects of frozen foods? 🤔

Thinking about ownership semantics for a planned refactoring of libscopehal to make heavier use of C smart pointers.
Instruments obviously have to have shared references to their channels.
Channels need weak references to their parent instrument, to prevent circular dependencies.
I'm still waffling over GUI elements, but I think we want shared references in most of the GUI long term (to enable a newly added node to exist in the filter graph dialog or a properties page…

Q-Probe: A Lightweight Approach to Reward Maximization for Language Models
Kenneth Li, Samy Jelassi, Hugh Zhang, Sham Kakade, Martin Wattenberg, David Brandfonbrener
https://arxiv.org/abs/2402.14688

Q-Probe: A Lightweight Approach to Reward Maximization for Language Models
We present an approach called Q-probing to adapt a pre-trained language model to maximize a task-specific reward function. At a high level, Q-probing sits between heavier approaches such as finetuning and lighter approaches such as few shot prompting, but can also be combined with either. The idea is to learn a simple linear function on a model's embedding space that can be used to reweight candidate completions. We theoretically show that this sampling procedure is equivalent to a KL-constrain…

Real-time scattering in the lattice Schwinger model
Irene Papaefstathiou, Johannes Knolle, Mari Carmen Ba\~nuls
https://arxiv.org/abs/2402.18429 https://…

Real-time scattering in the lattice Schwinger model
Tensor network methods have demonstrated their suitability for the study of equilibrium properties of lattice gauge theories, even close to the continuum limit. We use them in an out-of-equilibrium scenario, much less explored so far, by simulating the real-time collisions of composite mesons in the lattice Schwinger model. Constructing wave-packets of vector mesons at different incoming momenta, we observe the opening of the inelastic channel in which two heavier mesons are produced and identi…

The cost of environmental damage will be six times higher than the price of limiting global heating to 2C, study finds
Average incomes will fall by almost a fifth within the next 26 years as a result of the climate crisis, according to a new study that shows the costs of damage are six times higher than the price of limiting global heating to 2C.
Rising temperatures, heavier rainfall and more frequent and intense extreme weather are projected to cause
$38tn (£30tn) of destru…

I just watched two people walk in and sit down at a table. One person was wearing shorts and a t-shirt. The other person was wearing a heavier winter coat. It is that time of the year, I guess.

This https://arxiv.org/abs/2310.14807 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

On Chaitin's Heuristic Principle and Halting Probability
It would be a heavenly reward if there were a method of weighing theories and sentences in such a way that a theory could never prove a heavier sentence (Chaitin's Heuristic Principle). Alas, no satisfactory measure has been found so far, and this dream seemed too good to ever come true. In the first part of this paper, we attempt to revive Chaitin's lost paradise of heuristic principle as much as logic allows. In the second part, which is a joint work with M. Jalilvand and B. Nikzad, we study …

LA Times names Terry Tang as executive editor, the first female editor in the paper's 142-year history; Tang has been interim executive editor since January (Meg James/Los Angeles Times)
https://www.latimes.com/entertainment-arts…

L.A. Times names Terry Tang as executive editor
Since being tapped as interim executive editor, Tang moved rapidly to reorganize the newsroom, form her own leadership team and put a heavier emphasis on traditional news gathering.

Maryland will start charging higher registration fees on heavier vehicles

Maryland budget deal would increase vehicle fees, tobacco tax
The framework of the deal will eventually raise about $320 million to $350 million per year through a variety of vehicle-related fees and $80 million annually from hiking taxes on tobacco and nicotine products.

Teaching Higher-Order Logic Using Isabelle
Simon Tobias Lund (Technical University of Denmark), J{\o}rgen Villadsen (Technical University of Denmark)
https://arxiv.org/abs/2404.05458

Teaching Higher-Order Logic Using Isabelle
We present a formalization of higher-order logic in the Isabelle proof assistant, building directly on the foundational framework Isabelle/Pure and developed to be as small and readable as possible. It should therefore serve as a good introduction for someone looking into learning about higher-order logic and proof assistants, without having to study the much more complex Isabelle/HOL with heavier automation. To showcase our development and approach we explain a sample proof, describe the axiom…

A new SU(2/1) supergroup with determinant 1 explains many mysteries of the weak interactions
Jean Thierry-Mieg
https://arxiv.org/abs/2404.08641 https://

A new SU(2/1) supergroup with determinant 1 explains many mysteries of the weak interactions
Taken as a classification paradigm completing the standard model, a new compact form of the SU(2/1) supergroup explains many mysterious properties of the weak interactions: the maximal breaking of parity, the fractional charges of the quarks, the cancellation of the quantum field theory anomalies, and ties together the existence of the right neutrinos and of the heavier Fermions. This compact supergroup is constructed by exponentiating the matrices representing the leptons and the quarks which …

This https://arxiv.org/abs/2312.09189 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Mutually elusive: vectorlike antileptons and leptoquarks
We study the properties of vectorlike fermions that have the same gauge charges as the Standard Model lepton doublets, but opposite lepton number. These antileptons undergo decays mediated by heavier scalar leptoquarks, while the symmetries of this renormalizable model protect the vectorlike fermions and the leptoquarks from standard decays probed so far at colliders. If the new particles couple predominantly to second-generation quarks, then their collider probes involve multiple jets and two …

LA Times names Terry Tang as executive editor, the first female editor in the paper's 142-year history; Tang has been interim executive editor since January (Meg James/Los Angeles Times)
https://www.latimes.com/entertainment-arts…

L.A. Times names Terry Tang as executive editor
Since being tapped as interim executive editor, Tang moved rapidly to reorganize the newsroom, form her own leadership team and put a heavier emphasis on traditional news gathering.

New constraints on ultraheavy dark matter from the LZ experiment
J. Aalbers, D. S. Akerib, A. K. Al Musalhi, C. S. Amarasinghe, A. Ames, T. J. Anderson, N. Angelides, H. M. Ara\'ujo, J. E. Armstrong, M. Arthurs, A. Baker, S. Balashov, J. Bang, J. W. Bargemann, A. Baxter, K. Beattie, T. Benson, A. Bhatti, A. Biekert, T. P. Biesiadzinski, H. J. Birch, E. Bishop, G. M. Blockinger, B. Boxer, C. A. J. Brew, P. Br\'as, S. Burdin, M. Buuck, M. C. Carmona-Benitez, M. Carter, A. Chawla,…

New constraints on ultraheavy dark matter from the LZ experiment
Searches for dark matter with liquid xenon time projection chamber experiments have traditionally focused on the region of the parameter space that is characteristic of weakly interacting massive particles, ranging from a few GeV/$c^2$ to a few TeV/$c^2$. Models of dark matter with a mass much heavier than this are well motivated by early production mechanisms different from the standard thermal freeze-out, but they have generally been less explored experimentally. In this work, we present a re…

Spin orbit resonance cascade via core shell model. Application to Mercury and Ganymede
Pinzari Gabriella, Scoppola Benedetto, Veglianti Matteo
https://arxiv.org/abs/2402.07650

Spin orbit resonance cascade via core shell model. Application to Mercury and Ganymede
We discuss a model describing the spin orbit resonance cascade. We assume that the primary has a two-layer (core-shell) structure: it is composed by a thin solid crust and an inner and heavier solid core that are interacting due to the presence of a fluid interface. We assume two sources of dissipation: a viscous one, depending on the relative angular velocity between core and crust and a tidal one, smaller than the first, due to the viscoelastic structure of the core. We show how these two sou…

Signatures of Nuclear Isomers in Gamma-Ray Bursts from Binary Neutron Star Mergers
Maria C. Babiuc Hamilton, Joseph I. Powell
https://arxiv.org/abs/2402.06498

Signatures of Nuclear Isomers in Gamma-Ray Bursts from Binary Neutron Star Mergers
Neutron star mergers are astrophysical `gold mines,' synthesizing over half of the elements heavier than iron through rapid neutron capture nucleosynthesis. The observation of the binary neutron star merger GW170817, detected both in gravitational waves and electromagnetic radiation, marked a breakthrough. One electromagnetic component of this event, the gamma ray burst GRB 170817A, has an unresolved aspect: the characteristics of its prompt gamma-ray emission spectrum. In this work, we propose…

This https://arxiv.org/abs/2311.16014 has been replaced.
initial toot: https://mastoxiv.page/@…

Lévy flights and Lévy walks under stochastic resetting
Stochastic resetting is a protocol of starting anew, which can be used to facilitate the escape kinetics. We demonstrate that restarting can accelerate the escape kinetics from a finite interval restricted by two absorbing boundaries also in the presence of heavy-tailed, Lévy type, $α$-stable noise. However, the width of the domain where resetting is beneficial depends on the value of the stability index $α$ determining power-law decay of jump length distribution. For heavier (smaller $α$) …

New constraints on ultraheavy dark matter from the LZ experiment
J. Aalbers, D. S. Akerib, A. K. Al Musalhi, C. S. Amarasinghe, A. Ames, T. J. Anderson, N. Angelides, H. M. Ara\'ujo, J. E. Armstrong, M. Arthurs, A. Baker, S. Balashov, J. Bang, J. W. Bargemann, A. Baxter, K. Beattie, T. Benson, A. Bhatti, A. Biekert, T. P. Biesiadzinski, H. J. Birch, E. Bishop, G. M. Blockinger, B. Boxer, C. A. J. Brew, P. Br\'as, S. Burdin, M. Buuck, M. C. Carmona-Benitez, M. Carter, A. Chawla,…

New constraints on ultraheavy dark matter from the LZ experiment
Searches for dark matter with liquid xenon time projection chamber experiments have traditionally focused on the region of the parameter space that is characteristic of weakly interacting massive particles, ranging from a few GeV/$c^2$ to a few TeV/$c^2$. Models of dark matter with a mass much heavier than this are well motivated by early production mechanisms different from the standard thermal freeze-out, but they have generally been less explored experimentally. In this work, we present a re…

Pole properties of a resonance: When to subtract partial-decay widths to obtain the pole widths
J. A. Oller
https://arxiv.org/abs/2403.00135 https://

Pole properties of a resonance: When to subtract partial-decay widths to obtain the pole widths
When a resonance lies near the threshold of a heavier channel, an interesting feature can occur. The paradigmatic example employed here is the scalar isoscalar $f_0(980)$ resonance that couples to the lighter $ππ$ and heavier $K\bar{K}$ channels. It is shown that the decay width is given by the sum or subtraction of the partial decay widths depending on whether the pole lies in the Riemann sheet that is contiguous with the physical one above or below the $K\bar{K}$ threshold, respectively. Ne…

A=3 (e,e') $x_B \geq 1$ cross-section ratios and the isospin structure of short-range correlations
A. Schmidt, A. W. Denniston, E. M. Seroka, N. Barnea, D. W. Higinbotham, I. Korover, G. A. Miller, E. Piasetzky, M. Strikman, L. B. Weinstein, R. Weiss, O. Hen
https://arxiv.org/abs/2402.08199

A=3 (e,e') $x_B \geq 1$ cross-section ratios and the isospin structure of short-range correlations
We study the relation between measured high-$x_B$, high-$Q^2$, Helium-3 to Tritium, $(e,e')$ inclusive-scattering cross-section ratios and the relative abundance of high-momentum neutron-proton ($np$) and proton-proton ($pp$) short-range correlated (SRC) nucleon pairs in three-body ($A=3$) nuclei. Analysis of this data using a simple pair-counting cross-section model suggested a much smaller $np/pp$ ratio than previously measured in heavier nuclei, questioning our understanding of $A=3$ nuclei …

Superradiant Darwinism: survival of the lightest axion
Daniel Neves, Jo\~ao G. Rosa
https://arxiv.org/abs/2404.10507 https://arxiv.or…

Superradiant Darwinism: survival of the lightest axion
We study the dynamical evolution of superradiant instabilities of rotating black holes for multiple axion fields with comparable masses, motivated by string theory constructions, which typically exhibit a large number of light axions, with a broad range of masses. We show, in particular, that even though superradiant clouds for the heavier axion species grow faster, they are eventually reabsorbed by the black hole as the latter amplifies the lighter axion field(s), analogously to the dynamics o…

This https://arxiv.org/abs/2402.18429 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hep…

Real-time scattering in the lattice Schwinger model
Tensor network methods have demonstrated their suitability for the study of equilibrium properties of lattice gauge theories, even close to the continuum limit. We use them in an out-of-equilibrium scenario, much less explored so far, by simulating the real-time collisions of composite mesons in the lattice Schwinger model. Constructing wave-packets of vector mesons at different incoming momenta, we observe the opening of the inelastic channel in which two heavier mesons are produced and identi…

Extra Higgs boson searches at the LHC
Junquan Tao (on behalf of the ATLAS,CMS Collaborations)
https://arxiv.org/abs/2404.03571 https://

Extra Higgs boson searches at the LHC
Many searches for additional Higgs bosons, which are predicted by a lot of interesting models beyond the standard model, have been performed at the LHC. Some selected latest results of the searches for extra Higgs bosons at the LHC are presented. These additional Higgs bosons could be produced either directly from the parton interactions or from the decays of the observed standard model Higgs boson or a new heavier resonance. The searches used the data from proton-proton collisions delivered by…

This https://arxiv.org/abs/2402.19208 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Deciphering the Belle II data on $B\to K ν\barν$ decay in the (dark) SMEFT with minimal flavour violation
Recently, the Belle II collaboration announced the first measurement of $\mathcal B(B^+\to K^+ν\barν)$, which is found to be about $2.7σ$ higher than the SM prediction. We decipher the data with two new physics scenarios: the underlying $b\to s ν\barν$ transition is, besides the SM contribution, further affected by heavy new mediators that are much heavier than the EW scale, or amended by an additional decay channel with undetected light final states like dark matter or axion-like particle…

The electromagnetic form factors of heavy-light pseudo-scalar and vector mesons
Yin-Zhen Xu
https://arxiv.org/abs/2402.06141 https://…

The electromagnetic form factors of heavy-light pseudo-scalar and vector mesons
We systematically investigate the electromagnetic form factors of heavy-light pseudo-scalar and vector mesons within the Dyson-Schwinger/Bethe-Salpeter equations framework for the first time. It is found that the charge radius of vector meson is larger than that of its pseudo-scalar counterpart. In heavy-light systems, the flavor symmetry breaking will lead to a splitting of the form factor of different quark, and the distribution range of lighter and heavier quark gradually expands and contrac…

Neutrino mean free path in neutron stars in the presence of hyperons
Jesper Leong, Parada T. P. Hutauruk, Anthony W. Thomas
https://arxiv.org/abs/2404.03213

Neutrino mean free path in neutron stars in the presence of hyperons
We investigate the neutrino elastic differential cross-section (NDCS) and corresponding mean free path for neutral current scattering in the dense matter of a neutron star. A wide range of observed neutron star (NS) masses is considered, including the presence of $Λ$, $Ξ^{-}$, and $Ξ^{0}$ hyperons in the heaviest stars. Their presence significantly decreases the total neutrino mean free path in the heavier stars.

Novel collider signatures in the type-I 2HDM $a$ model
Spyros Argyropoulos, Ulrich Haisch, Ilia Kalaitzidou
https://arxiv.org/abs/2404.05704 https://

Novel collider signatures in the type-I 2HDM+$a$ model
The 2HDM+$a$ model is one of the main models used in the interpretations of dark matter searches at the LHC. So far, all the 2HDM+$a$ benchmarks considered by the ATLAS and CMS experiments are limited to a type-II Yukawa sector, in which the Higgs bosons $A$, $H$, and $H^\pm$ are all constrained to be mass-degenerate and heavier than around $600 \, {\rm GeV}$. In this work, we present the first detailed study of 2HDM+$a$ models with a type-I Yukawa sector, which, for moderate values of $\tanβ$…

This https://arxiv.org/abs/2306.17037 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepp…

Self-Interacting Forbidden Dark Matter under a Cannibally Co-Decaying Phase
In a usual dark matter (DM) model without a huge mass difference between the DM and lighter mediator, using the coupling strength suitable for having the correct relic density, the resulting self-interaction becomes several orders of magnitude smaller than that required to interpret the small scale structures. We present a framework that can offer a solution for this point. We consider a model that contains the vector DM and a heavier but unstable Higgs-like scalar in the hidden sector. When th…