Study of theηandη′mesons with improved staggered fermions

Autor:	Craig McNeile, Chris M. Richards, Eric Brittain Gregory, Alan C. Irving
Rok vydání:	2012
Předmět:	Quark Quantum chromodynamics Physics Nuclear and High Energy Physics Particle physics Meson High Energy Physics::Lattice Eta meson Fermion Lattice QCD Pion Lattice gauge theory High Energy Physics::Experiment Nuclear Experiment
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
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::54945bd7938e2b4620d305d31165f439 https://doi.org/10.1103/physrevd.86.014504 Zobrazit plný text záznamu