Compact Muon Solenoid
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| CMS-PAS-EXO-21-011 | ||
| Search for long-lived heavy neutral leptons in proton-proton collision events with a lepton and a jet from a secondary vertex at $ \sqrt{s}= $ 13 TeV | ||
| CMS Collaboration | ||
| 25 March 2024 | ||
| Abstract: A search for long-lived heavy neutral leptons (HNLs) using proton-proton collision data with an integrated luminosity corresponding to 138 fb$ ^{-1} $ collected at $ \sqrt{s}= $ 13 TeV with the CMS detector at the CERN LHC is presented. The HNLs are searched for in events with a secondary vertex, corresponding to the semileptonic decay of a long-lived HNL. The final states include the presence of a charged lepton originating from the primary vertex, as well as a second charged lepton and a hadronic jet that are associated with the secondary vertex. No excess of events above the standard model expectation is observed. Exclusion limits at 95% confidence level are evaluated on the HNL masses and the mixing parameters with the standard model neutrinos in the mass range 1-16 GeV, with excluded squared mixing parameter values reaching as low as 10$^{-7} $. | ||
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Links:
CDS record (PDF) ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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