Radiative Corrections to Neutrino-Deuteron Scattering Revisted

An issue related to radiative corrections to the SNO neutral current induced process, i.e., νe+d→νe+p+n is reexamined. This problem is closely related to the definition of the axial-vector coupling constant gA, which receives radiative corrections of a constant term. This constant correction term must be evaluated with reference to similar constant corrections in the case of charged current processes. After computing and including all these constant correction terms, we find 1.7 (1.5) per cent enhancement for the neutral current induced reaction if the Higgs boson mass is . This number happens to be close to that given previously by Kurylov et al., but the strategy of our calculation is quite different.