Searching for left sneutrino LSP at the LHC
Jul 8, 2017
62 pages
Published in:
- Int.J.Mod.Phys.A 33 (2018) 18n19, 1850110
- Published: Jul 4, 2018
e-Print:
- 1707.02471 [hep-ph]
View in:
Citations per year
Abstract: (WSP)
We analyze relevant signals expected at the LHC for a left sneutrino as the lightest supersymmetric particle (LSP). The discussion is carried out in the “μ from ν” supersymmetric standard model (μνSSM), where the presence of R-parity breaking couplings involving right-handed neutrinos solves the μ problem and reproduces neutrino data. The sneutrinos are pair produced via a virtual W, Z or γ in the s channel. From the prompt decay of a pair of left sneutrinos LSPs of any family, a significant diphoton signal plus missing transverse energy (MET) from neutrinos can be present in the mass range 118–132 GeV, with 13 TeV center-of-mass energy and an integrated luminosity of 100 fb−1. In addition, in the case of a pair of tau left sneutrinos LSPs, given the large value of the tau Yukawa coupling diphoton plus leptons and/or multileptons can appear. We find that the number of expected events for the multilepton signal, together with properly adopted search strategies, is sufficient to give a significant evidence for a sneutrino of mass in the range 130–310 GeV, even with the integrated luminosity of 20 fb−1. In the case of the signal producing diphoton plus leptons, an integrated luminosity of 100 fb−1 is needed to give a significant evidence in the mass range 95–145 GeV. Finally, we discuss briefly the presence of displaced vertices and the associated range of masses.Note:
- Version published in IJMPA. 54 pages, 8 figures, 14 tables
- 12.60.Jv
- 14.80.Ly
- Supersymmetry phenomenology
- supersymmetric Standard Model
- sneutrino: mass
- sneutrino: LSP
- neutrino: right-handed
- standard model: supersymmetry
- coupling: Yukawa
- transverse energy: missing-energy
References(121)
Figures(34)
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