Sterile Neutrinos at MAPP in the B-L Model

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 $Z^{\mathrm{\prime }}$, 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 $m_N\mathrm{/}{m}_{Z^{\mathrm{\prime }}}$ 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 $\alpha \approx 0.002$.