Tootfinder

Passive radiative cooling using temperature-dependent emissivity can sometimes outperform static emitters
Yeonghoon Jin, Jin-Woo Cho, Mikhail A. Kats
https://arxiv.org/abs/2506.11259

Passive radiative cooling using temperature-dependent emissivity can sometimes outperform static emitters
In passive sky-facing radiative cooling, wavelength-selective thermal emitters in the atmospheric transparency window of 8-13 $μ$m can reach lower temperatures compared to broadband emitters, but broadband emitters always have higher cooling power when the emitter is warmer than the ambient. Here, we propose a temperature-tunable thermal emitter that switches between a wavelength-selective state -- with high emissivity only in the atmospheric transparency window of 8-13 $μ$m -- and a broadban…

Systematic study of charm meson M1 radiative transitions
Binesh Mohan, Christas Mony A., Rohit Dhir
https://arxiv.org/abs/2506.10560 https://

Systematic study of charm meson M1 radiative transitions
Motivated by recent experimental advancements in the study of radiative decays of charmed mesons, we investigate the magnetic (transition) moments of vector mesons by applying the effective mass scheme, obtained from the one-gluon exchange interaction between quark-antiquark pairs. By incorporating high-precision experimental data from both heavy and light flavor sectors, we accurately account for the strong hyperfine interaction contributions to the quark and antiquark masses within mesons. We…

Accurate Reduced Floating-Point Precision Implicit Monte Carlo
Simon Butson, Mathew Cleveland, Alex Long, Todd Palmer
https://arxiv.org/abs/2506.11962 http…

Accurate Reduced Floating-Point Precision Implicit Monte Carlo
This work describes methodologies to successfully implement the Implicit Monte Carlo (IMC) scheme for thermal radiative transfer in reduced-precision floating-point arithmetic. The methods used can be broadly categorized into scaling approaches and floating-point arithmetic manipulations. Scaling approaches entail re-scaling values to ensure computations stay within a representable range. Floating-point arithmetic manipulations involve changes to order of operations and alternative summation al…

Ly$\alpha$ radiative transfer modeling for 163 MUSE Ly$\alpha$-emitting galaxies at $z=$3--6
Sangeun Yu, Hyunmi Song, Kwang-il Seon
https://arxiv.org/abs/2506.08290

Ly$α$ radiative transfer modeling for 163 MUSE Ly$α$-emitting galaxies at $z=$3--6
We utilized Ly$α$ radiative transfer calculations from \citet{Song2020} to investigate the properties of extended Ly$α$ halos around star-forming galaxies in the \textit{Hubble} Ultra Deep Field, observed by the Multi-Unit Spectroscopic Explorer. Expanding on the work of \citet{Song2020}, which was limited to eight galaxies, we derived best-fit models for a significantly larger sample of 163 galaxies, which successfully reproduced both their Ly$α$ spectra and surface brightness profiles (SBP…

The role of spin-orbit coupling and state-crossing topography in the non-radiative decay of Ir(III) complexes
Ivan Soriano-Diaz, Ilya D. Dergachev, Sergey A. Varganov, Enrique Orti, Angelo Giussani
https://arxiv.org/abs/2506.07682

The role of spin-orbit coupling and state-crossing topography in the non-radiative decay of Ir(III) complexes
A pillar of our current understanding of the photoluminescence of Ir(III) complexes is the assumption that the population of triplet metal-centered states determines an efficient non-radiative decay to the ground state minimum. Based on that assumption, the energy separation between the emitting state and the minimum-energy crossing point of the triplet metal-centered and the ground states has been employed as a key variable for evaluating the ability of Ir(III) complexes to decay non-radiative…

Radiative decays of $P$-wave charmed baryons in the $SU(3)$ flavor $\bf6_F$ representation
Xuan Luo, Hua-Xing Chen, Er-Liang Cui, Hui-Min Yang, Dan Zhou, Zhi-Yong Zhou
https://arxiv.org/abs/2506.08335

Radiative decays of $P$-wave charmed baryons in the $SU(3)$ flavor $\bf6_F$ representation
We perform a comprehensive investigation of the radiative decays of $P$-wave charmed baryons in the $SU(3)$ flavor $\mathbf{6}_F$ representation, employing the light-cone QCD sum rule approach within the framework of heavy quark effective theory. We analyze their electromagnetic transitions into ground-state charmed baryons via photon emission. When combined with the mass spectra and strong decay properties previously studied in Ref.~\cite{Yang:2021lce}, our results constitute a systematic and …

Peering into the heart of 3CR radio galaxies. A very long baseline interferometry perspective on optical-radio classifications at parsec scales
P. Grandi, G. Giovannini, E. Torresi, B. Boccardi
https://arxiv.org/abs/2506.07589

Peering into the heart of 3CR radio galaxies. A very long baseline interferometry perspective on optical-radio classifications at parsec scales
Historically, luminous edge-brightened Fanaroff-Riley type II (FRII) radio galaxies have been associated with radiatively efficient cold accretion disks. In contrast, faint edge-darkened Fanaroff-Riley Type Is (FRIs) are sustained by hot, inefficient accretion flows. However, several sources deviate from this paradigm, showing FRII morphologies and radiatively inefficient accretion. Three hypotheses have been proposed to explain the observations: (1) The evolutionary scenario: initially strong …

$\eta$ and $\eta'$ production in $J/\psi$ radiative decays from quantum chromodynamics
Mischa Batelaan, Jozef J. Dudek, Robert G. Edwards
https://arxiv.org/abs/2506.09306

$η$ and $η'$ production in $J/ψ$ radiative decays from quantum chromodynamics
We present a first principles calculation within quantum chromodynamics (QCD) of the radiative decays of the $J/ψ$ into the light pseudoscalar mesons $η$ and $η'$. Within a lattice computation we obtain the transition form-factors as a function of photon virtuality from the timelike region, accessible experimentally via the 'Dalitz' decay $J/ψ\to e^+ e^-\, η^{(\prime)} $, through to the real photon point corresponding to $J/ψ\to γ\, η^{(\prime)} $. This is the first calculation in latti…

$\eta$ and $\eta'$ meson production in $J/\psi$ radiative decays from lattice QCD
Mischa Batelaan, Jozef J. Dudek, Robert G. Edwards
https://arxiv.org/abs/2506.09305

$η$ and $η'$ meson production in $J/ψ$ radiative decays from lattice QCD
We report on the computation of amplitudes describing the radiative decay processes $J/ψ\to γ\, η$ and $J/ψ\to γ\, η'$ from first principles via lattice QCD. Using lattices with two degenerate flavors of light quark and a heavier strange quark where $m_π\sim 391$ MeV, we compute three-point correlation functions using optimized meson operators with a range of momenta. The use of optimized operators allows access to the $η'$, even though it appears as an excited state, lying above the gr…

Radiative decay of $\chi_{c1}$ states in effective Lagrangian approach
Thanat Sangkhakrit, Attaphon Kaewsnod, Ayut Limphirat, Khanchai Khosonthongkee, Warintorn Sreethawong, Nopmanee Supanam, Yupeng Yan
https://arxiv.org/abs/2506.08406

Radiative decay of $χ_{c1}$ states in effective Lagrangian approach
The $χ_{c1}(3872)$ state, first observed by the Belle collaboration with its quantum numbers identified as $J^{PC} = 1^{++}$, has been the subject of extensive research due to its intriguing properties. Several theoretical interpretations have been proposed to explain its unique characteristics, including the $χ_{c1}(2P)$ assignment, a molecular $\bar{D}^{*}D/\bar{D}D^{*}$ configuration, a coupled-channel framework incorporating $c\bar{c}$ and di-meson degrees of freedom, and the compact tetr…