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
收藏
页码：513 / 515
页数：3
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