Long-Lived BLSSM Particles at the LHC
release_lzdckfsz75eixh6myxyksxetje
by
W. Abdallah, A. Hammad, A. Kasem, S. Khalil
2018
Abstract
We investigate the collider signatures of neutral and charged Long-Lived
Particles (LLPs), predicted by the Supersymmetric B-L extension of the
Standard Model (BLSSM), at the Large Hadron Collider (LHC). The BLSSM is a
natural extension of the Minimal Supersymmetric Standard Model (MSSM) that can
account for non-vanishing neutrino masses. We show that the lightest
right-handed sneutrino can be the Lightest Supersymmetric Particle (LSP), while
the Next-to-the LSP (NLSP) is either the lightest left-handed sneutrino or the
left-handed stau, which are natural candidates for the LLPs. We analyze the
displaced vertex signature of the neutral LLP (the lightest left-handed
sneutrino), and the charged tracks associated with the charged LLP (the
left-handed stau). We show that the production cross sections of our neutral
and charged LLPs are relatively large, namely of order O(1) fb.
Thus, probing these particles at the LHC is quite plausible. In addition, we
find that the displaced di-lepton associated with the lightest left-handed
sneutrino has a large impact parameter that discriminates it from other SM
leptons. We also emphasize that the charged track associated with the
left-handed stau has a large momentum with slow moving charged tracks, hence it
is distinguished from the SM background and therefore it can be accessible at
the LHC.
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