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International Workshop : From Parity Violation to Hadronic Structure and more... Part 3 - PAVI06, Milos Island : Grèce
Two-pion-exchange parity-violating potential and $\vec{n} p \to d \gamma$
C.H. Hyun1, S. Ando, B. Desplanques1

We calculate the parity-violating nucleon-nucleon potential in heavy-baryon chiral perturbation theory up to the next-to-next-to-leading order. The one-pion exchange comes in the 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 $\vec{n} p \to d \gamma$ at the threshold. The one-pion dominates the physical observable and the two-pion contribution is about or less than 10% of the one-pion contribution.
1 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
Physique/Physique des Hautes Energies - Phénoménologie

Physique/Physique Nucléaire Expérimentale

Physique/Physique Nucléaire Théorique
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