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

  • C. H. HyunEmail author
  • S. Ando
  • B. Desplanques
PAVI 2006


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 n pdγ 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.


21.30.Fe Forces in hadronic systems and effective interactions 12.15.Ji Applications of electroweak models to specific processes 


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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  1. 1.Department of Physics and Institute of Basic ScienceSungkyunkwan UniversitySuwonKorea
  2. 2.Laboratoire de Physique Subatomique et de CosmologieGrenoble CedexFrance

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