Study of the η and η′ mesons with improved staggered fermions

被引：34
作者：
Gregory, Eric B. [1 ,3 ]
Irving, Alan C. [2 ]
Richards, Christopher M. [2 ]
McNeile, Craig [3 ]
机构：
[1] Univ Cyprus, Dept Phys, CY-1678 Nicosia, Cyprus
[2] Univ Liverpool, Dept Math Sci, Div Theoret Phys, Liverpool L69 7ZL, Merseyside, England
[3] Berg Univ Wuppertal, D-42119 Wuppertal, Germany
来源：
PHYSICAL REVIEW D | 2012年 / 86卷 / 01期
关键词：
LATTICE; FORMULA; FLAVORS; QCDOC;
D O I：
10.1103/PhysRevD.86.014504
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on a high statistics lattice QCD calculation of the mass of the eta and eta' mesons using ASQTAD improved staggered fermions. The calculation used two ensembles with different lattice spacings and pion masses. We also report results for eta-eta' 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.
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页数：10
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