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Compact Muon Solenoid
LHC, CERN

CMS-PAS-SUS-21-001
Search for direct pair production of supersymmetric partners to the τ lepton in the all-hadronic final state at s= 13 TeV
Abstract: A search for the direct production of a pair of τ sleptons in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. The search is carried out in events with two τ leptons, each decaying to one or more hadrons and a neutrino. In addition to scenarios in which the τ sleptons decay promptly, the search also addresses scenarios in which the τ sleptons have macroscopic lifetimes, giving rise to displaced τ leptons. The data were collected with the CMS detector from 2016 to 2018, and correspond to an integrated luminosity of 137 fb1. No significant excess is seen in the observed event counts with respect to the standard model background expectation. Limits on pair production of both promptly decaying and long-lived τ sleptons are obtained in the framework of simplified models in which the τ slepton decays to a τ lepton and the lightest supersymmetric particle (LSP), which is assumed to be stable. In the case of purely left-handed τ slepton pair production, with a prompt decay to a τ lepton and a nearly massless LSP, τ slepton masses between 115 and 340 GeV are excluded. In a scenario with macroscopic τ slepton decay lengths corresponding to cτ0= 0.1 mm, τ slepton masses between 150 and 220 GeV are excluded for the case that the LSP is nearly massless.
CMS Publications
Compact Muon Solenoid
LHC, CERN