<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>R</mml:mi></mml:math>-parity violation and light neutralinos at ANUBIS and MAPP
Herbert K. Dreiner, J. Günther, Zeren Simon Wang
Abstract
In $R$-parity-violating supersymmetry the lightest neutralino can be very light, even massless. For masses in the range $500\text{ }\text{ }\mathrm{MeV}\ensuremath{\lesssim}{m}_{{\stackrel{\texttildelow{}}{\ensuremath{\chi}}}_{1}^{0}}\ensuremath{\lesssim}4.5\text{ }\text{ }\mathrm{GeV}$ the neutralino can be produced in hadron collisions from rare meson decays via an $R$-parity-violating coupling, and subsequently decay to a lighter meson and a charged lepton. Due to the small neutralino mass and for small $R$-parity-violating coupling the lightest neutralino is long lived, leading to displaced vertices at fixed-target and collider experiments. In this work, we study such signatures at the proposed experiments ANUBIS and MoEDAL-MAPP at the LHC. We also compare their sensitivity reach in these scenarios with that of other present and proposed experiments at the LHC such as ATLAS, CODEX-b, and MATHUSLA. We find that ANUBIS and MAPP can show complementary or superior sensitivity.