Diquark effects in light baryon correlators from lattice QCD

被引：29

作者：

DeGrand, Thomas ^{[1
]}

Liu, Zhaofeng ^{[2
]}

Schaefer, Stefan ^{[3
]}

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] Univ Paris 11, CNRS, Ctr Orsay, Phys Theor Lab Bat 210,UMR8627, F-91405 Orsay, France

[3] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.77.034505

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the role of diquarks in light baryons through point-to-point baryon correlators. We contrast results from quenched simulations with ones with two flavors of dynamical overlap fermions. The scalar, pseudoscalar, and axial vector diquarks are combined with light quarks to form color singlets. The quenched simulation shows large zero-mode effects in correlators containing the scalar and pseudoscalar diquark. The two scalar diquarks created by gamma(5) and gamma(0)gamma(5) lead to different behavior in baryon correlators, showing that the interaction of diquarks with the third light quark matters: we do not see an isolated diquark. In our quark mass range, the scalar diquark created by gamma(5) seems to play a greater role than the others.

引用

页数：11

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