Charge symmetry breaking in the valence quark distributions of the nucleon

被引：21

作者：

Benesh, CJ

Goldman, T

机构：

[1] LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA

[2] IOWA STATE UNIV, INT INST THEORET & APPL PHYS, AMES, IA 50010 USA

来源：

PHYSICAL REVIEW C | 1997年 / 55卷 / 01期

关键词：

D O I：

10.1103/PhysRevC.55.441

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Using a quark model, we study the effect of charge symmetry breaking on the valence quark distributions of the nucleon. The effect due to quark mass differences and the Coulomb interaction of the electrically charged quarks is calculated and, in contrast to recent claims, found to be small. In addition, we investigate the effect of charge symmetry breaking in the confining interaction, and in the perturbative evolution equations used to relate the quark model distributions to experiment. We find that both these effects are small, and that the strong charge symmetry breaking effect included in the scalar confining interactions may be distinguishable from that generated by quark mass differences.

引用

页码：441 / 447

页数：7

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