Tootfinder

I think a tram is coming from behind.

This https://arxiv.org/abs/2505.09879 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

New cosmological constraints on the evolution of dark matter energy density
We constrain the evolution of dark matter energy density over time, specifically focusing on deviation from the standard model represented by the equation $ρ_{m}\propto(1+z)^{3-\varepsilon}$, where $\varepsilon$ is a constant parameter. Utilizing a diverse array of observational datasets, including baryon acoustic oscillations (BAO) data from the first release of the Dark Energy Spectroscopic Instrument (DESI), distance priors derived from cosmic microwave background (CMB) observations by the …

This https://arxiv.org/abs/2502.04080 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

AT 2018dyk: tidal disruption event or active galactic nucleus? Follow-up observations of an extreme coronal line emitter with the Dark Energy Spectroscopic Instrument
We present fresh insights into the nature of the tidal disruption event (TDE) candidate AT 2018dyk. AT 2018dyk has sparked a debate in the literature around its classification as either a bona-fide TDE or as an active galactic nucleus (AGN) turn-on state change. A new follow-up spectrum taken with the Dark Energy Spectroscopic Instrument, in combination with host-galaxy analysis using archival SDSS-MaNGA data, supports the identification of AT 2018dyk as a TDE. Specifically, we classify this ob…

This https://arxiv.org/abs/2502.04053 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_hepe…

Proof of principle for a light dark matter search with low-energy positron beams at NA64
Thermal light dark matter (LDM) with particle masses in the 1 MeV - 1 GeV range could successfully explain the observed dark matter abundance as a relic from the primordial Universe. In this picture, a new feeble interaction acts as a "portal" between the Standard Model and LDM particles, allowing for the exploration of this paradigm at accelerator experiments. In the last years, the "missing energy" experiment NA64e at CERN SPS (Super Proton Synchrotron) has set world-leading constraints in th…

This https://arxiv.org/abs/2408.11158 has been replaced.
initial toot: https://mastoxiv.page/@ar…

A Transition Edge Sensor Operated in Coincidence with a High Sensitivity Athermal Phonon Sensor for Photon Coupled Rare Event Searches
Experimental searches for axions or dark photons that couple to the standard model photon require photosensors with low noise, broadband sensitivity, and near zero backgrounds. Here, we introduce an experimental architecture, in which a small photon sensor, in our case a Transition Edge Sensor (TES) with a photon energy resolution $σ_γ= 368.4 \pm 0.4$ meV, is colocated on the same substrate as a large high sensitivity athermal phonon sensor (APS) with a phonon energy resolution $σ_\mathrm{ph…

This https://arxiv.org/abs/2501.05683 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Dark Energy Survey Year 6 Results: Synthetic-source Injection Across the Full Survey Using Balrog
Synthetic source injection (SSI), the insertion of sources into pixel-level on-sky images, is a powerful method for characterizing object detection and measurement in wide-field, astronomical imaging surveys. Within the Dark Energy Survey (DES), SSI plays a critical role in characterizing all necessary algorithms used in converting images to catalogs, and in deriving quantities needed for the cosmology analysis, such as object detection rates, galaxy redshift estimation, galaxy magnification, s…

This https://arxiv.org/abs/2505.20430 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

DESI Emission Line Galaxies: Clustering Dependence one Stellar Mass and [OII] Luminosity
We measure the projected two-point correlation functions of emission line galaxies (ELGs) from the Dark Energy Spectroscopic Instrument (DESI) One-Percent Survey and model their dependence on stellar mass and [OII] luminosity. We select $\sim$180,000 ELGs with redshifts of $0.8 < z < 1.6$ and define 27 samples according to cuts in redshift and both galaxy properties. Following a framework that describes the conditional [OII] luminosity-stellar mass distribution as a function of halo mass, we si…

Extractivism comes back to Europe as mineral demands are set to rocket.
The only way is to use far less energy.
#degrowth
Europe’s lithium rush leaves mineral-rich communities in the dark

Europe’s lithium rush leaves mineral-rich communities in the dark
Some local residents say they haven't been adequately consulted before the rollout of Europe's lithium plans and fear for their incomes

Search for a dark baryon in the $\Xi^-\rightarrow\pi^- {\rm invisible}$ decay
BESIII Collaboration, et al.
https://arxiv.org/abs/2505.22140 https://…

Search for a dark baryon in the $Ξ^-\rightarrowπ^-+{\rm invisible}$ decay
A search for a dark baryon is performed for the first time in the two-body decay $Ξ^-\rightarrowπ^-+{\rm invisible}$ using $(10.087\pm0.044)\times10^{9}$ $J/ψ$ events collected at a center-of-mass energy of $\sqrt{s}=3.097\,\mbox{GeV}$ with the BESIII detector at the BEPCII collider. No significant signal is observed, and the 90% (95%) confidence level upper limits on the branching fraction $B(Ξ^-\rightarrowπ^-+{\rm invisible})$ are determined to be $4.2\times10^{-5}$ ($5.2\times10^{-5}$),…

This https://arxiv.org/abs/2505.20358 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Is GGAG:Ce@SiO$_2$-RB composite a prospective material for X-ray induced photodynamic therapy?
Nanocomposite material ($\mathrm{GGAG:Ce^{3+}@SiO_2-RB}$) for potential use in X-ray induced photodynamic therapy (X-PDT) was developed, thoroughly characterized, and evaluated. It consists of a scintillating $\mathrm{Gd_3(Ga_{1-x}Al_x)_5O_{12}:Ce^{3+}}$ core encapsulated in silica layer and functionalized with the photosensitizer Rose Bengal (RB). Radioluminescence measurements confirmed the energy transfer from the scintillating core to Rose Bengal. Dark toxicity and radiosensitisation effect…

This https://arxiv.org/abs/2504.06290 has been replaced.
initial toot: https://mastoxiv.page/@arX…

A DESI universe with time-dependent dark energy is 119 Myr younger than a LambdaCDM universe
On the basis of their redshift and Lyman-alpha measurements, the Dark Energy Spectroscopic Instrument (DESI) collaboration suggest that dark energy varies with the scale factor $a$ as $ ρ_{de}(a)={} \, a^{-3(1 + w_0 + w_a)} e^{-3 w_a (1-a)}ρ_{de,0} $ in which $w_0 = - 0.752 \pm 0.057$ and $w_a ={} - 0.86^{+0.23}_{-0.20} $. Such a DESI universe is 119 Myr younger than the LambdaCDM universe.

Is GGAG:Ce@SiO$_2$-RB composite a prospective material for X-ray induced photodynamic therapy?
Iveta Terezie Ho\v{s}nov\'a, Krist\'yna Havlinov\'a, Jan B\'arta, Karol\'ina Mocov\'a, Xenie Lytvynenko, Lenka Prouzov\'a Proch\'azkov\'a, Vojt\v{e}ch Kazda, Franti\v{s}ek H\'ajek, Viliam M\'u\v{c}ka, V\'aclav \v{C}uba

Is GGAG:Ce@SiO$_2$-RB composite a prospective material for X-ray induced photodynamic therapy?
Nanocomposite material ($\mathrm{GGAG:Ce^{3+}@SiO_2-RB}$) for potential use in X-ray induced photodynamic therapy (X-PDT) was developed, thoroughly characterized, and evaluated. It consists of a scintillating $\mathrm{Gd_3(Ga_{1-x}Al_x)_5O_{12}:Ce^{3+}}$ core encapsulated in silica layer and functionalized with the photosensitizer Rose Bengal (RB). Radioluminescence measurements confirmed the energy transfer from the scintillating core to Rose Bengal. Dark toxicity and radiosensitisation effect…