Regular Article - Theoretical Physics
Searching for stop LSP at the LHC
Instituto de Física Teórica (IFT) UAM-CSIC, Campus de Cantoblanco, 28049, Madrid, Spain
2 Departamento de Física Teórica, Universidad Autónoma de Madrid (UAM), Campus de Cantoblanco, 28049, Madrid, Spain
3 Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405, Orsay, France
4 Faculty of Physics, University of Warsaw, Pasteura 5, 02-093, Warsaw, Poland
5 Instituto de Física de Buenos Aires UBA and CONICET, Departamento de Física, Facultad de Ciencia Exactas y Naturales, Universidad de Buenos Aires, 1428, Buenos Aires, Argentina
6 Pontificia Universidad Católica Argentina, Av. Alicia Moreau de Justo 1500, 1107, Buenos Aires, Argentina
7 Department of Physics, University of Tokyo, 113-0033, Tokyo, Japan
8 Research Center for Advanced Particle Physics, Kyushu University, 819-0395, Fukuoka, Japan
Accepted: 13 March 2022
Published online: 26 March 2022
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 SSM, where the presence of R-parity violating couplings involving right-handed neutrinos solves the -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 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).
© The Author(s) 2022
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