CMS-PAS-EXO-23-014

CMS-PAS-EXO-23-014
Search for long-lived particles decaying to a pair of muons in pp collisions at $ \sqrt{s}= $ 13.6 TeV with 2022 data
CMS Collaboration
23 August 2023

Abstract: An inclusive search for long-lived exotic particles decaying to a pair of muons is presented. The search uses data collected by the CMS experiment at the CERN LHC in proton-proton collisions at $ \sqrt{s}= $ 13.6 TeV in 2022 and corresponding to an integrated luminosity of 36.7 fb$ ^{-1} $. The experimental signature is a pair of oppositely charged muons originating from a common secondary vertex spatially separated from the pp interaction point by distances ranging from several hundred $ \mu $m to several meters. The results are interpreted in the frameworks of the hidden Abelian Higgs model, in which the Higgs boson decays to a pair of long-lived dark photons; and of an $ R $-parity violating supersymmetry model, in which long-lived neutralinos decay to a pair of muons and a neutrino. The results show substantial improvements as compared to the analysis performed using data taken at $ \sqrt{s}= $ 13 TeV, particularly at low masses and long lifetimes, mainly because of improved triggers for displaced muons and offline analysis refinements.
Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; These preliminary results are superseded in this paper, Accepted by JHEP. The superseded preliminary plots can be found here.

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