Searching for stop LSP at the LHC

ESSODJOLO KPATCHA, IÑAKI LARA, DANIEL E. LÓPEZ -FOGLIANI, CARLOS MUÑOZ, NATSUMI NAGATA, HIDETOSHI OTONO

EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS

SPRINGER

Lugar: Berlin; Año: 2022 vol. 82

1434-6044

We analyze relevant signals expected at the LHC for a stop as thelightest supersymmetric particle (LSP). The discussion is carried outin the framework of the 𝜇$mu u$SSM, where the presence ofR-parity violating couplings involving right-handed neutrinossolves the $mu$-problem and reproduces neutrino data. The stops arepair produced at the LHC, decaying with displaced vertices to alepton and a bottom quark or a neutrino and a top quark. We comparethe predictions of this scenario with ATLAS and CMS searches forlong-lived particles. To analyze the parameter space we sample the$mu u$SSM for a stop LSP using a likelihood data-driven method,and paying special attention to reproduce the current experimentaldata on neutrino and Higgs physics, as well as flavor observables.Our results translate into a lower limit on the mass of the left(right) stop LSP of 1068 GeV (1341 GeV), corresponding to a decaylength of 1.86 mm (6.61 mm).p { margin-bottom: 0.25cm; line-height: 115%; background: transparent }