Parity nonconserving observables in thermal neutron capture on a proton

Abstract

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.

13 pages, 11 eps figures

References in corpus (2)

• Parity-Violating Interaction Effects in the np System
• Parity Violation in Proton-Proton Scattering at 221 MeV

Cited by in corpus (14)

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• The Theory of Parity Violation in Few-Nucleon Systems
• First Observation of $P$-odd $\gamma$ Asymmetry in Polarized Neutron Capture on Hydrogen
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• Hadronic parity violation in $\vec{n}p\to d\gamma$ with effective field theory
• Energy dependence of the parity-violating asymmetry of circularly polarized photons in $d\vec{\gamma }\to np$ in pionless effective field theory
• Parity violation in neutron capture on the proton: determining the weak pion-nucleon coupling
• Effective Field Theory in The Study of Long Range Nuclear Parity Violation on Lattice
• Two-pion-exchange parity-violating potential and $\vec{n}p\to d\gamma$
• Polarization of the neutron induced from hadronic weak interactions in the photo-disintegration of the deuteron
• Parity nonconservation in deuteron photoreactions
• Parity-violating $\pi NN$ coupling constant from the flavor-conserving effective weak chiral Lagrangian
• Parity nonconserving cold neutron-parahydrogen interactions