Lattice study of the masses of singlet 0++ mesons

被引：71

作者：

Hart, A. ^{[1
]}

McNeile, C.

Michael, C.

Pickavance, J.

机构：

[1] Univ Edinburgh, Sch Phys, SUPA, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Liverpool, Dept Math Sci, Div Theoret Phys, Liverpool L69 3BX, Merseyside, England

来源：

PHYSICAL REVIEW D | 2006年 / 74卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.74.114504

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compute the masses of the flavor singlet 0(++) mesons using (n(f)=2) unquenched lattice QCD with the Iwasaki and Wilson gauge actions. Both fermionic and glueball interpolating operators are used to create the states. The mass of the lightest 0(++) meson is suppressed relative to the mass of the 0(++) glueball in quenched QCD at an equivalent lattice spacing. The low value for mass of the lightest flavor singlet 0(++) meson obtained in our calculation could be due to either: that the mass of the meson is much lower than that of the 0(++) glueball in quenched QCD, or due to the effect of lattice artifacts. We present arguments for the first option, but we are unable to rule out the explanation due to lattice artifacts.

引用

页数：9

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