TY  - JOUR
AU  - Ghosh, P.
AU  - Lara, I.
AU  - Lopez-Fogliani, D. E.
AU  - Muñoz, C.
AU  - Ruiz de Austri, R.
PY  - 2018
DA  - 2018//
TI  - Searching for left sneutrino LSP at the LHC
T2  - Int. J. Mod. Phys. A
JO  - International Journal of Modern Physics A
SP  - 1850110
EP  - 62pp
VL  - 33
IS  - 18-19
PB  - World Scientific Publ Co Pte Ltd
KW  - Supersymmetry phenomenology
KW  - supersymmetric Standard Model
AB  - 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.
SN  - 0217-751x
UR  - http://arxiv.org/abs/1707.02471
UR  - https://doi.org/10.1142/S0217751X18501105
DO  - 10.1142/S0217751X18501105
LA  - English
N1  - WOS:000438183700004
ID  - Ghosh_etal2018
ER  -