Compact Muon Solenoid
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| CMS-PAS-EXO-20-015 | ||
| Search for long-lived particles decaying in the CMS endcap muon system in proton-proton collisions at $\sqrt{s}= $ 13 TeV | ||
| CMS Collaboration | ||
| May 2021 | ||
| Abstract: A search for long-lived particles (LLPs) produced in decays of standard model (SM) Higgs bosons in 137 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}= $ 13 TeV recorded by the CMS experiment during 2016-2018 is presented. The search employs a novel technique to reconstruct hadronic decays of LLPs in the endcap muon system. The search is sensitive to a broad range of LLP decay modes including $\tau^{-}\tau^{+}$, LLP masses as low as a few GeV, and is largely model-independent. No excess of events above the SM background is observed and stringent limits on the Higgs boson ($\mathrm{h}^0$) branching fraction to LLPs ($\mathrm{S}$) are obtained, particularly for proper decay lengths greater than a few meters. This search result represents the most stringent limits on the branching fraction $\mathcal{B}(\mathrm{h}^0 \rightarrow\mathrm{S}\mathrm{S})$ for proper decay lengths greater than 6-40 m for S masses between 7-40 GeV. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
Physics Briefing ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, PRL 127 (2021) 261804. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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