Study of theηandη′mesons with improved staggered fermions

Autor: Craig McNeile, Chris M. Richards, Eric Brittain Gregory, Alan C. Irving
Rok vydání: 2012
Předmět:
Zdroj: Physical Review D. 86
ISSN: 1550-2368
1550-7998
DOI: 10.1103/physrevd.86.014504
Popis: We report on a high statistics lattice QCD calculation of the mass of the $\ensuremath{\eta}$ and ${\ensuremath{\eta}}^{\ensuremath{'}}$ mesons using ASQTAD improved staggered fermions. The calculation used two ensembles with different lattice spacings and pion masses. We also report results for $\ensuremath{\eta}\mathrm{\text{\ensuremath{-}}}{\ensuremath{\eta}}^{\ensuremath{'}}$ mixing. The results are in satisfactory agreement with other lattice calculations using other fermion formulations and with experiment, given the unphysical quark masses used. We see no evidence of abnormal behavior at the lattice spacings studied.
Databáze: OpenAIRE
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