Massive Right-handed Neutrinos in B Decays

Abstract

In this paper, we present the differential decay distributions for $\bar{B}\to D^{(\ast )}\ell \bar{X}$ decays with a massive right-handed neutrino in the low-energy effective field theory framework and show how the massive effects of the RH neutrinos can explain the positive value of the difference in forward-backward asymmetries, $\Delta A_{\text{FB}}\equiv A_{\text{FB}}^{\mu }-A_{\text{FB}}^e$, tentatively inferred from Belle data. We also make predictions for $q^2$ dependent angular observables to motivate future measurements.

Comments: 4 pages, 4 figures, Proceedings for FPCP 2022, Oxford Mississippi, May 23-27, 2022