%0 Journal Article
%T Searching for left sneutrino LSP at the LHC
%A Ghosh, P.
%A Lara, I.
%A Lopez-Fogliani, D. E.
%A Muñoz, C.
%A Ruiz de Austri, R.
%J International Journal of Modern Physics A
%D 2018
%V 33
%N 18-19
%I World Scientific Publ Co Pte Ltd
%@ 0217-751x
%G English
%F Ghosh_etal2018
%O WOS:000438183700004
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3654), last updated on Fri, 28 Jun 2019 07:20:00 +0000
%X 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 "mu from nu" supersymmetric standard model (mu nu SSM), where the presence of R-parity breaking couplings involving right-handed neutrinos solves the μproblem and reproduces neutrino data. The sneutrinos are pair produced via a virtual W, Z or gamma 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.
%K Supersymmetry phenomenology
%K supersymmetric Standard Model
%R 10.1142/S0217751X18501105
%U http://arxiv.org/abs/1707.02471
%U https://doi.org/10.1142/S0217751X18501105
%P 1850110-62pp