Search for supersymmetry in events with a photon, a lepton, and missing transverse momentum in pp collisions at s=8 TeV

Abstract

A search for supersymmetry involving events with at least one photon, one electron or muon, and large missing transverse momentum has been performed by the CMS experiment. The data sample corresponds to an integrated luminosity of 19.7 fb −1 of pp collisions at √ s = 8 TeV, produced at the CERN LHC. No excess of events is observed beyond expectations from standard model processes. The result of the search is interpreted in the context of a general model of gauge-mediated supersymmetry breaking, where the charged and neutral winos are the next-to-lightest supersymmetric particles. Within this model, winos with a mass up to 360 GeV are excluded at the 95% confidence level. Two simplified models inspired by gauge-mediated supersymmetry breaking are also examined, and used to derive upper limits on the production cross sections of specific supersymmetric processes.

Search for supersymmetry in events with a photon, a lepton, and missing transverse momentum in proton-proton collisions at $$ \sqrt{s} = 13 $$ TeV

“…None of these analyses observed any significant excess of events over their respective SM predictions. This paper improves the sensitivity of the previous CMS result obtained at √ s = 8 TeV [22].…”

Dipole portal to heavy neutral leptons

“…The LHC also provides us with the opportunity to probe the charged current HNL extension. We make use of a √ s = 8 TeV CMS search for supersymmetric models with gauge-mediated breaking [51]. In its analysis, the collaboration searched for 1 electron/muon with transverse momentum greater than 25 GeV, 1 or more photons, and missing energy greater than 120 GeV.…”

Vacuum misalignment and pattern of scalar masses in the SU(5)/SO(5) composite Higgs model

“…Thus, roughly 12% of the pair production events yield SSL final states, for cross sections of roughly 0.1 fb for the smallest mass in our benchmark scenario. The low mass range may, therefore, be accessible to LHC Run-II searches based on SSL, like for instance in Refs [69][70][71][72]. At higher masses, above ≈ 650 GeV, decays involving photons become very abundant: using the BRs from Fig.…”