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Markov chain Monte Carlo analysis to probe trilinear R-parity violating SUSY scenarios and possible LHC signatures

Arghya Choudhury1,*, Sourav Mitra2,†, Arpita Mondal1,‡, and Subhadeep Mondal3,§

  • *Contact author: arghya@iitp.ac.in
  • †Contact author: hisourav@gmail.com
  • ‡Contact author: arpita_1921ph15@iitp.ac.in
  • §Contact author: subhadeep.mondal@bennett.edu.in
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Phys. Rev. D 112, 015016 – Published 18 July, 2025

DOI: https://doi.org/10.1103/r6v9-nck7

Abstract

In this article, we probe the trilinear R-parity violating (RPV) supersymmetric (SUSY) scenarios with specific nonzero interactions in the light of neutrino oscillation, Higgs, and flavor observables. We attempt to fit the set of observables using a state-of-the-art Markov Chain Monte Carlo (MCMC) setup and study its impact on the model parameter space. Our main objective is to constrain the trilinear couplings individually, along with some other SUSY parameters relevant to the observables. We present the constrained parameter regions in the form of marginalized posterior distributions on different two-dimensional parameter planes. We perform our analyses with two different scenarios characterized by our choices for the lightest SUSY particle (LSP), bino, and stop. Our results indicate that the lepton number violating trilinear couplings λi33 (i=1, 2) and λj33′ (j=1, 2, 3) can be at most of the order of 10−4 or even smaller while tanβ is restricted to below 15 even when 3σ allowed regions are considered. We further comment on the possible LHC signatures of these LSPs focusing on and around the best-fit regions.

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Phys. Rev. D 112, 015016– Published 18 July, 2025
  • Received 6 January 2025
  • Accepted 18 June 2025
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