Bethe-Salpeter amplitudes of Upsilons

Rasmus Larsen, Stefan Meinel, Swagato Mukherjee, Peter Petreczky

Research output: Contribution to journalArticlepeer-review

Abstract

Based on lattice nonrelativistic QCD (NRQCD) studies, we present results for Bethe-Salpeter amplitudes for ϒ(1S), ϒ(2S), and ϒ(3S) in vacuum as well as in quark-gluon plasma. Our study is based on 2+1 flavor 483×12 lattices generated using the Highly Improved Staggered Quark action and with a pion mass of 161 MeV. At zero temperature, the Bethe-Salpeter amplitudes follow the expectations based on nonrelativistic potential models. At nonzero temperatures, the interpretation of Bethe-Salpeter amplitudes turns out to be more nuanced but consistent with our previous lattice QCD study of excited Upsilons in quark-gluon plasma.

Original languageEnglish (US)
Article number114508
JournalPhysical Review D
Volume102
Issue number11
DOIs
StatePublished - Dec 11 2020

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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