Two-pion-exchange parity-violating potential and $\vec{n}p\to d\gamma$

Abstract

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.

3 pages, contribution to the workshop PAVI06 held in Milos island, Greece, May 16-20, 2006

References in corpus (5)

• Nuclear Parity-Violation in Effective Field Theory
• Parity-Violating Interaction Effects in the np System
• Asymmetry in $\vec{n}+p->d+\gamma$
• About the parity-non-conserving asymmetry in n+p--->d+gamma
• Parity nonconserving observables in thermal neutron capture on a proton

Cited by in corpus (8)

• The Time-Reversal- and Parity-Violating Nuclear Potential in Chiral Effective Theory
• Parity violation in low energy neutron deuteron scattering
• Parity-violating two-pion exchange nucleon-nucleon interaction
• Parity violation in radiative neutron capture on deuteron
• The Δcontribution to the parity-violating nucleon-nucleon force
• Parity nonconserving proton-proton elastic scattering
• Parity nonconservation in deuteron photoreactions
• Parity nonconserving cold neutron-parahydrogen interactions