Zobrazeno 1 - 10
of 379
pro vyhledávání: '"Vairo Antonio"'
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:
EPJ Web of Conferences, Vol 258, p 04009 (2022)
We explore a novel approach to compute the force between a static quark-antiquark pair with the gradient flow algorithm on the lattice. The approach is based on inserting a chromoelectric field in a Wilson loop. The renormalization issues, associated
Externí odkaz:
https://doaj.org/article/cddc672201b14925b3a637a1c8499440
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
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
We use gradient flow to compute the static force based on a Wilson loop with a chromoelectric field insertion. The result can be compared on one hand to the static force from the numerical derivative of the lattice static energy, and on the other han
Externí odkaz:
http://arxiv.org/abs/2212.12400