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arXiv · 2111.13212

Searching for stop LSP at the LHC

Essodjolo Kpatcha·Iñaki Lara·Daniel E. López-Fogliani·Carlos Muñoz·Natsumi Nagata·Hidetoshi Otono
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Abstract

We analyze relevant signals expected at the LHC for a stop as the lightest supersymmetric particle (LSP). The discussion is carried out in the framework of the $\mu\nu$SSM, where the presence of $R$-parity violating couplings involving right-handed neutrinos solves the $\mu$-problem and reproduces neutrino data. The stops are pair produced at the LHC, decaying with displaced vertices to a lepton and a bottom quark or a neutrino and a top quark. We compare the predictions of this scenario with ATLAS and CMS searches for long-lived particles. To analyze the parameter space we sample the $\mu\nu$SSM for a stop LSP using a likelihood data-driven method, and paying special attention to reproduce the current experimental data 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 decay length of 1.86 mm (6.61 mm).

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Essodjolo Kpatcha, Iñaki Lara, Daniel E. López-Fogliani, Carlos Muñoz, Natsumi Nagata, Hidetoshi Otono. 2021-11-25. Searching for stop LSP at the LHC. https://doi.org/10.1140/epjc%2Fs10052-022-10216-0

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