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pro vyhledávání: '"P. Vairo"'
Two decades ago the $\chi_{c1}\left(3872\right)$ was discovered in the hadron spectrum with two heavy quarks. The discovery fueled a surge in experimental research, uncovering dozens of so called XYZ exotics states lying outside the conventional quar
Externí odkaz:
http://arxiv.org/abs/2411.14306
Publikováno v:
Phys. Rev. D 110, 094040 (2024)
The discovery of XYZ exotic states in the hadronic sector with two heavy quarks, represents a significant challenge in particle theory. Understanding and predicting their nature remains an open problem. In this work, we demonstrate how the Born$-$Opp
Externí odkaz:
http://arxiv.org/abs/2408.04719
We compute the suppression of bottomonium in the quark-gluon plasma using the three-loop QCD static potential. The potential describes the spin-averaged bottomonium spectrum below threshold with a less than 1% error. Within potential nonrelativistic
Externí odkaz:
http://arxiv.org/abs/2403.15545
Publikováno v:
Proceedings of Science (PoS) 2024
For a quantitative investigation on the time evolution of heavy thermal dark matter at and after thermal freeze-out, near-threshold processes need to be taken into account which have a large impact on the observed dark matter relic abundance. In this
Externí odkaz:
http://arxiv.org/abs/2402.14199
For non-relativistic thermal dark matter, close-to-threshold effects largely dominate the evolution of the number density for most of the times after thermal freeze-out, and hence affect the cosmological relic density. A precise evaluation of the rel
Externí odkaz:
http://arxiv.org/abs/2402.12787
Publikováno v:
Phys.Rev.D 109 (2024) 11, 114517
The static QCD force from the lattice can be used to extract $\Lambda_{\overline{\textrm{MS}}}$, which determines the running of the strong coupling. Usually, this is done with a numerical derivative of the static potential. However, this introduces
Externí odkaz:
http://arxiv.org/abs/2312.17231
Publikováno v:
Letters in High Energy Physics 2023
In this conference paper, we consider effective field theories of non-relativistic dark matter particles interacting with a light force mediator in the early expanding universe. We present a general framework, where to account in a systematic way for
Externí odkaz:
http://arxiv.org/abs/2304.07180
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-52 (2024)
Abstract For non-relativistic thermal dark matter, close-to-threshold effects largely dominate the evolution of the number density for most of the times after thermal freeze-out, and hence affect the cosmological relic density. A precise evaluation o
Externí odkaz:
https://doaj.org/article/8a6310a08ec14cb0a4850f24a760d611
In order to predict the cosmological abundance of dark matter, an estimation of particle rates in an expanding thermal environment is needed. For thermal dark matter, the non-relativistic regime sets the stage for the freeze-out of the dark matter en
Externí odkaz:
http://arxiv.org/abs/2304.00113
Autor:
Brambilla, Nora, Escobedo, Miguel Ángel, Islam, Ajaharul, Strickland, Michael, Tiwari, Anurag, Vairo, Antonio, Griend, Peter Vander
Publikováno v:
Phys. Rev. D 108, L011502 (2023)
We demonstrate the importance of quantum jumps in the nonequilibrium evolution of bottomonium states in the quark-gluon plasma. Based on nonrelativistic effective field theory and the open quantum system framework, we evolve the density matrix of col
Externí odkaz:
http://arxiv.org/abs/2302.11826