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SUMMARY:η and η' mesons from lattice QCD
DTSTART;VALUE=DATE-TIME:20261010T072500Z
DTEND;VALUE=DATE-TIME:20261010T074000Z
DTSTAMP;VALUE=DATE-TIME:20261005T083151Z
UID:indico-contribution-2844@indico.itp.ac.cn
DESCRIPTION:Speakers: 立强 李 (河北大学)\nUnderstanding the masses 
 of $\\eta$ and $\\eta$' mesons as well as the mixing between the original 
 flavor singlet state and the neutral octet state is an important topic in 
 low-energy strong-interaction physics. We determine masses and mixing angl
 e of the $\\eta$ and $\\eta$' mesons in lattice QCD. The calculations are 
 carried out on a set of 13 CLQCD gauge ensembles with $N_f$ = 2 + 1 Wilson
 -Clover quarks. These ensembles cover three values of the lattice spacing 
 a = 0.105\, 0.077\, 0.052fm and pion masses from 136 to 317MeV\, including
  two ensembles at physical pion mass. In all ensembles\, we used all-to-al
 l quark propagators\, named perambulators\, generated via a distillation s
 mearing algorithm to improve signal quality. The fitting results indicate 
 that the perambulators perform well for both connected and disconnected di
 agrams of the correlation function\, without requiring too many configurat
 ions. This provides a solid foundation for accurately calculating the mass
 es of the $\\eta$ and $\\eta$' mesons\, especially the $\\eta$'.\n\nhttps:
 //indico.itp.ac.cn/event/437/contributions/2844/
LOCATION:会议楼2 CXII102
URL:https://indico.itp.ac.cn/event/437/contributions/2844/
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