Tensor and scalar interactions of neutrinos may lead to observable neutrino magnetic moments

Abstract

Recently more generalized four-fermion interactions of neutrinos such as tensor and scalar interactions (TSIs) have been extensively studied in response to forthcoming precision measurements of neutrino interactions. In this letter, we show that due to the chirality-flipping nature, at the 1-loop level TSIs typically generate much larger ($10^{7}\sim10^{10}$) neutrino magnetic moments ($ν$MMs) than the vector case. For some cases, the large $ν$