Resonant slepton production and right sneutrino dark matter in left-right supersymmetry

Mariana Frank (1) , Benjamin Fuks (2, 3) , Katri Huitu (4) , Santosh Kumar Rai (5) , Harri Waltari (4)

1 Concordia University [Montreal]
2 LPTHE - Laboratoire de Physique Théorique et Hautes Energies
3 IUF - Institut universitaire de France
4 HIP - Helsinki Institute of Physics
5 HBNI - Homi Bhabha National Institute

Right-handed sneutrinos are natural components of left-right symmetric su-persymmetric models where the gauge sector is extended to include right-handed weak interactions. Unlike in other models where right-handed sneutrinos are gauge singlets, here the right sneutrino is part of a doublet and could be a dark matter candidate whose annihilation proceeds via gauge interactions. We investigate this possibility, and find that relic density, low-energy observable and direct supersymmetry search constraints can be satisfied when the lightest supersymmetric particle is a right-handed sneutrino. We introduce benchmarks for left-right supersymmetric realizations where either a sneutrino or a neutralino is the lightest superpartner. We then study the LHC signals arising through resonant right-handed slepton production via a W R gauge-boson exchange that lead to final states enriched in leptons, additionally containing a large amount of missing transverse momentum, and featuring a low jet multiplicity. We find that such a resonant production would boost the chances of discovering these weakly interacting supersymmetric particles for a mass range extending beyond 1 TeV already with a luminosity of 100 fb −1. Finally, we compare sneutrino versus neutralino scenarios, and comment on differences with other sneutrino dark matter models.

Domaines: Physique [physics]

Mariana Frank, Benjamin Fuks, Katri Huitu, Santosh Kumar Rai, Harri Waltari. Resonant slepton production and right sneutrino dark matter in left-right supersymmetry. Journal of High Energy Physics, 2017, 5, pp.015. ⟨10.1007/JHEP05(2017)015⟩. ⟨hal-01528495⟩