QUENCHED CHIRAL PERTURBATION-THEORY FOR BARYONS

被引：23

作者：

LABRENZ, JN ^{[1
]}

SHARPE, SR ^{[1
]}

机构：

[1] UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195

来源：

NUCLEAR PHYSICS B | 1994年

关键词：

D O I：

10.1016/0920-5632(94)90383-2

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We develop quenched chiral perturbation theory for baryons using the graded-symmetry formalism of Bernard and Golterman and calculate non-analytic contributions to the baryon masses coming from quenched chiral loops. The usual term is-proportional-to m(q)3/2 is substantially altered due to the cancellation of diagrams with internal quark loops. In addition, the eta' ''hairpin'' vertex leads to a new correction, proportional to m(q)1/2. We compare our results to numerical lattice data and use them to estimate the size of the quenching error in the nucleon mass.

引用

页码：335 / 337

页数：3

共 6 条

[1] CHIRAL PERTURBATION-THEORY FOR THE QUENCHED APPROXIMATION OF QCD [J].