Helicity asymmetries in neutrino-nucleus interactions

Details Helicity asymmetries in neutrino-nucleus interactions Helicity asymmetries in neutrino-nucleus interactions

2005-09-30

arxiv.org/abs/nucl-th/0509103v1

Physical Review C 73 (2006), 064605

Physics

Nuclear Physics

Nuclear Theory

14 pages, 6 figures, 1 table submitted to PLB

Scientific paper

10.1103/PhysRevC.73.064605

We investigate the helicity properties of the ejectile in quasi-elastic neutrino-induced nucleon-knockout reactions and consider the 12C target as a test case. A formalism based on a relativistic mean-field model is adopted. The influence of final-state interactions is evaluated within a relativistic multiple-scattering Glauber approximation (RMSGA) model. Our calculations reveal that the helicity asymmetries A_l in A(\overline{\nu},\overline{\nu}'N) processes are extremely sensitive to strange-quark contributions to the weak vector form-factors. Thereby, nuclear corrections, such as final-state interactions and off-shell ambiguities in the electroweak current operators, are observed to be of marginal importance. This facilitates extracting strange-quark information from the helicity asymmetry A_l.

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