The longitudinal asymmetry A_z(n-3He) in the 3He(n, p)3H reaction is an observable directly related to parity-violating (PV) components in the nucleon-nucleon (NN) interaction. Here we study A_z(n-3He) using a PV NN potential derived from an effective field theory framework at next-to-next-to-leading order, including one- and two-pion exchanges, contact interactions and relativistic corrections. This potential depends on six low-energy constants. Some of these parameters are constrained to reproduce the existing accurate measurements of the p-p longitudinal asymmetry. Using these constraints we compute A_z(n-3He) and study the sensitivity of such an observable to the unconstrained parameters.

The parity-violating asymmetry in the 3He(n, p)3H reaction

GIRLANDA, Luca;
2012-01-01

Abstract

The longitudinal asymmetry A_z(n-3He) in the 3He(n, p)3H reaction is an observable directly related to parity-violating (PV) components in the nucleon-nucleon (NN) interaction. Here we study A_z(n-3He) using a PV NN potential derived from an effective field theory framework at next-to-next-to-leading order, including one- and two-pion exchanges, contact interactions and relativistic corrections. This potential depends on six low-energy constants. Some of these parameters are constrained to reproduce the existing accurate measurements of the p-p longitudinal asymmetry. Using these constraints we compute A_z(n-3He) and study the sensitivity of such an observable to the unconstrained parameters.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11587/376296
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