Neutral current coherent pion production

Details Neutral current coherent pion production Neutral current coherent pion production

2007-07-14

arxiv.org/abs/0707.2172v2

Phys.Rev.C76:068501,2007; Erratum-ibid.C80:029904,2009

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures, minor corrections, a few references added

Scientific paper

10.1103/PhysRevC.76.068501

We investigate the neutrino induced coherent pion production reaction at low and intermediate energies. The model includes pion, nucleon and Delta(1232) resonance as the relevant hadronic degrees of freedom. Nuclear medium effects on the production mechanisms and pion distortion are taken into account. We obtain that the dominance of the Delta excitation holds due to large cancellations among the background contributions. We consider two sets of vector and axial-vector N-Delta transition form-factors, evidencing the strong sensitivity of the results to the axial coupling C5A(0). The differences between neutrino and antineutrino cross sections, emerging from interference terms, are also discussed.

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