MT2 to the Rescue -- Searching for Sleptons in Compressed Spectra at the LHC

Abstract

We propose a novel method for probing sleptons in compressed spectra at hadron colliders. The process under study is slepton pair production in R-parity conserving supersymmetry, where the slepton decays to a neutralino LSP of mass close to the slepton mass. In order to pass the trigger and obtain large missing energy, an energetic mono-jet is required. Both leptons need to be detected in order to suppress large standard model backgrounds with one charged lepton. We study variables that can be used to distinguish the signal from the remaining major backgrounds, which include tt, WW+jet, Z+jet, and single top production. We find that the dilepton MT2, bound by the mass difference, can be used as an upper bound to efficiently reduce the backgrounds. It is estimated that sleptons with masses up to about 150 GeV can be discovered at the 14 TeV LHC with 100/fb integrated luminosity.

12 pages, 6 figures

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• GUT-inspired SUSY and the muon g-2 anomaly: prospects for LHC 14 TeV
• Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC
• Natural Supersymmetry, Muon $g-2$, and the Last Crevices for the Top Squark
• Neutralinos and Sleptons at the LHC in Light of Muon $(g-2{)}_{\mu }$
• LHC Collider Phenomenology of Minimal Universal Extra Dimensions
• Photon collider search strategy for sleptons and dark matter at the LHC
• Hunting for Scalar Lepton Partners at Future Electron Colliders
• Enhancing the discovery prospects for SUSY-like decays with a forgotten kinematic variable
• Probing Squeezed Bino-Slepton Spectra with the Large Hadron Collider
• Search for the SUSY Electroweak Sector at $ep$ Colliders
• Machine Learning Techniques for Intermediate Mass Gap Lepton Partner Searches at the Large Hadron Collider