Excitation of the 15.110 MeV state of 12C by neutrinos or antineutrinos

Abstract

Formulae for cross sections of ν 12 C(g.s.) → ν 12 C ∗(15.110) and ν 12 C(g.s.) → ν 12 C ∗(15.110) and for angular distributions and circular polarizations of the subsequent decay photons are derived in a model-independent (elementary-particle) approach. Our results indicate that, granting validity of the isotriplet hypothesis which relates the isovector components of the hadronic neutral weak current to the hadronic charged weak polar and axial currents, the numerical predictions of these quantities are strikingly different between solutions A and B.