Multilepton and multiphoton signatures of supersymmetry at the LHC
arXiv:1405.5882
Abstract
Motivated by the absence of any clear signal of physics beyond the Standard Model at the LHC after Run I, we discuss one possible slight hint of new physics and one non-minimal extension of the Standard Model. In the first part we provide a tentative explanation of a small excess of multilepton events, observed by the CMS collaboration, by means of a simplified model of gauge mediated supersymmetry breaking. In the second part we discuss how the standard phenomenology of gauge mediation can be significantly modified if one makes the non-minimal assumption that supersymmetry is broken in more than one hidden sector. Such multiple hidden sector models involve light neutral fermions called pseudo-goldstini and, due to the extra decay steps they induce, where soft photons are emitted, these models give rise to multiphoton plus missing energy signatures. We discuss why the existing LHC searches are poorly sensitive to these model and we propose new searches designed to probe them.
7 pages, 4 figures. Contribution to the proceedings of the 49th Rencontres de Moriond, Electroweak Interactions and Unified Theories session, 2014
References in corpus (9)
- General Gauge Mediation
- Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
- Search for anomalous production of events with three or more leptons in pp collisions at sqrt(s) = 8 TeV
- Selectron NLSP in Gauge Mediation
- Brane-Worlds Pseudo-Goldstinos
- Stimulated Supersymmetry Breaking
- Naturalness in low-scale SUSY models and "non-linear" MSSM
- Multilepton signals of gauge mediated supersymmetry breaking at the LHC
- Collider signatures of low scale supersymmetry breaking: A Snowmass 2013 White Paper