Sterile Neutrinos at MAPP in the B-L Model

Abstract

The possibility of searching for right-handed neutrinos at the MoEDAL's Apparatus for Penetrating Particles (MAPP) detector is investigated in this work. In particular, pair-production of right-handed (RH) neutrinos $N$ from either a $B-L$ gauge boson $Z^{\prime }$, as well as Standard Model (SM) $Z$ boson are considered. Under a no-background assumption, we show that the MAPP detector can be sensitive to active-sterile neutrino mixing strengths as low as $V_{\mu N}^2\approx 10^{-12}$ for multiple choices of $m_N/m_{Z^{\prime }}$ values, when taking the $B-L$ gauge coupling $g_{B-L}=10^{-3}$ near its current limit. The SM $Z$ boson portal can reach a similar sensitivity, when the effective mixing between the $B-L$ and SM gauge boson is $\alpha \approx 0.002$.

Comments: 13 pages+refs, 5 figures. Matches invited contribution to MAPP EPJ Special Topic