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Pair collisions in atomic gases lead to decoherence and decay. Assuming that all the atoms in the gas are equally likely to collide one is led to consider Lindbladian of mean field type where the evolution in the limit of many atoms reduces…

Quantum Physics · Physics 2018-05-11 A. Tsabary , O. Kenneth , J. E. Avron

The impact of temperature-induced deformations and shape fluctuations on the particle stability and decay processes has been investigated across the isotopes of hot nuclear systems with $Z = 28$ to $50$, with focus on astrophysically…

Nuclear Theory · Physics 2026-03-09 Mamta Aggarwal , Pranali Parab , G. Saxena

In this paper, based on a canonical quantization scheme, we study the effect of the relativistic motion of an excited atom on its decay rate in the presence of absorbing and dispersive media. For this purpose, we introduce an appropriate…

Quantum Physics · Physics 2018-06-13 Fariba Shafieiyan , Ehsan Amooghorban , Ali Mahdifar

The status of top quark searches will be briefly reviewed. Theoretical predictions for the top quark decay rate are presented including QCD and electroweak radiative corrections. The possibilities for quarkonium searches at an hadron…

High Energy Physics - Phenomenology · Physics 2007-05-23 J. H. Kühn

Non-linear effects in accelerator physics are important for both successful operation of accelerators and during the design stage. Since both of these aspects are closely related, they will be treated together in this overview. Some of the…

Accelerator Physics · Physics 2016-01-22 W. Herr

I consider the $\gamma W$-box correction to superallowed nuclear $\beta$-decays in the framework of dispersion relations. I address a novel effect of a distortion of the emitted electron energy spectrum by nuclear polarizabilities and show…

Nuclear Theory · Physics 2019-07-31 Mikhail Gorchtein

Exchange interaction strongly influences the long-range behaviour of localised electron orbitals. It violates the oscillation theorem (creates extra nodes) and produces a power-law decay instead of the usual exponential decrease at large…

Materials Science · Physics 2012-12-12 V. V. Flambaum

How fast processes can we measure? Attosecond physics address the limit of measurable time in science. Atomic X-ray excited states offers a way to study extremely fast dynamics with chemical specificity. In black phosphorous an X-ray…

Materials Science · Physics 2020-03-31 Fredrik O. L. Johansson , Yasmine Sassa , Tomas Edvinsson , Andreas Lindblad

We study the impact of a temperature-dependent curvaton decay rate on the primordial curvature perturbation generated in the curvaton scenario. Using the familiar sudden decay approximation, we obtain an analytical expression for the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-22 Naoya Kitajima , David Langlois , Tomo Takahashi , Tomohiro Takesako , Shuichiro Yokoyama

As the next generation of large accelerator-based facilities are being considered at the Snowmass 2021 study high priority has to be given to environmental sustainability including energy consumption, natural resource use and the…

Accelerator Physics · Physics 2022-04-01 Thomas Roser

Positronium is an ideal system for the research of the bound state QED. New precise measurement of orthopositronium decay rate has been performed with an accuracy of 150 ppm. This result is consistent with the last three results and also…

High Energy Physics - Experiment · Physics 2009-01-14 Y. Kataoka , S. Asai , T. Kobayashi

Specialized hardware accelerators aid the rapid advancement of artificial intelligence (AI), and their efficiency impacts AI's environmental sustainability. This study presents the first publication of a comprehensive AI accelerator…

Hardware Architecture · Computer Science 2025-02-05 Ian Schneider , Hui Xu , Stephan Benecke , David Patterson , Keguo Huang , Parthasarathy Ranganathan , Cooper Elsworth

We analyze the cross section for inverse beta decay, focusing on the moderate energies (a few MeV to hundreds of MeV) relevant for reactor and supernova neutrinos. We discuss the updated evaluations of values and uncertainties in the cross…

High Energy Physics - Phenomenology · Physics 2025-02-25 Giulia Ricciardi , Natascia Vignaroli , Francesco Vissani

A series of findings in machine learning (ML) and decay theory are captured while exploring the role of deformation and preformation factors in {\alpha} decay. We provide a novel and practical paradigm for developing physics-driven machine…

Nuclear Theory · Physics 2025-04-08 Ruixiong Li , Jingyu Xiao , Hongfei Zhang , Nana Ma

We report on systematic and high-precision measurements of dephasing, an effect that fundamentally limits the performance of laser wakefield accelerators. Utilizing shock-front injection, a technique providing stable, tunable and…

Accelerator Physics · Physics 2015-06-01 D. E. Cardenas , S. Chou , J. Xu , L. Hofmann , A. Buck , K. Schmid , C. M. S. Sears , D. E. Rivas , B. Shen , L. Veisz

A large experimental program is being mounted to search for neutrinoless double-beta decay over the next decade. Multiple experiments using different target isotopes are being prepared to explore the whole parameter space allowed for…

High Energy Physics - Phenomenology · Physics 2023-03-22 Matteo Agostini , Frank F. Deppisch , Graham Van Goffrier

Binary systems can be powerful sources of non-thermal emission from radio to gamma rays. When the latter are detected, then these objects are known as gamma-ray binaries. In this work, we explore, in the context of gamma-ray binaries,…

High Energy Astrophysical Phenomena · Physics 2017-08-23 V. Bosch-Ramon , F. M. Rieger

An improved formalism of the two-neutrino double-beta decay ($2\nu\beta\beta$-decay) rate is presented, which takes into account the dependence of energy denominators on lepton energies via the Taylor expansion. Till now, only the leading…

Nuclear Theory · Physics 2018-04-13 Fedor Šimkovic , Rastislav Dvornický , Dušan Štefánik , Amand Faessler

Latest experimental and evaluated $\alpha$-decay half-lives between 82$\leq$Z$\leq$118 have been used to modify two empirical formulas: (i) Horoi scaling law [J. Phys. G \textbf{30}, 945 (2004)], and Sobiczewski formula [Acta Phys. Pol. B…

Nuclear Theory · Physics 2021-05-26 G. Saxena , P. K. Sharma , Prafulla Saxena

Two-photon decay rates of pseudoscalar, scalar and tensor states of charmonium and bottomonium are calculated in the framework of the relativistic quark model. Both relativistic effects and one-loop radiative corrections are taken into…

High Energy Physics - Phenomenology · Physics 2016-09-06 D. Ebert , R. N. Faustov , V. O. Galkin