Two-pion-exchange parity-violating potential and np→dγ

被引：10

作者：

Hyun, C. H. ^{[1
]}

Ando, S.

Desplanques, B.

机构：

[1] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, Inst Basic Sci, Suwon 440746, South Korea

[3] Lab Phys Subatom & Cosmol, IN2P3 UJF INPG, CNRS, UMR, F-38026 Grenoble, France

来源：

EUROPEAN PHYSICAL JOURNAL A | 2007年 / 32卷 / 04期

关键词：

21; 30; Fe Forces in hadronic systems and effective interactions; 12; 15; Ji Applications of electroweak models to specific processes;

D O I：

10.1140/epja/i2006-10426-8

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：

We calculate the parity-violating nucleon-nucleon potential in heavy-baryon chiral perturbation theory up to next-to-next-to-leading order. The one-pion exchange enters in leading order and the next-to-next-to-leading order consists of two-pion-exchange and the two-nucleon contact terms. In order to investigate the effect of the higher-order contributions, we calculate the parity-violating asymmetry in np -> d gamma at threshold. The one-pion-exchange contribution dominates the physical observable, while the two-pion-exchange contribution is about or less than 10% of the one-pion-exchange one.

引用

页码：513 / 515

页数：3

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