Parity nonconserving observables in thermal neutron capture on a proton

Details Parity nonconserving observables in thermal neutron capture on a proton Parity nonconserving observables in thermal neutron capture on a proton

2004-11-26

arxiv.org/abs/nucl-th/0411102v1

Eur.Phys.J.A24:129-135,2005

Physics

Nuclear Physics

Nuclear Theory

13 pages, 11 eps figures

Scientific paper

10.1140/epja/i2004-10131-8

We calculate parity nonconserving observables in the processes where a neutron is captured on a proton at the threshold energy radiating a photon. Various potential models such as Paris, Bonn and Argonne $v18$ are used for the strong interactions, and the meson-exchange description is employed for the weak interactions between hadrons. The photon polarization $P_\gamma$ in the unpolarized neutron capture process and photon asymmetry $A_\gamma$ in the polarized neutron capture process are obtained in terms of the weak meson-nucleon coupling constants. $A_\gamma$ turns out to be basically insensitive to the employed strong interaction models and thus can be uniquely determined in terms of the weak coupling constants, but $P_\gamma$ depends significantly on the strong interaction models.

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