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PUBDB-2024-04937

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Search for the lepton-flavor violating decay of the Higgs boson and additional Higgs bosons in the $e\mu$ final state at $\sqrt s$ = 13 TeV within CMS

Leyva Pernia, D. (Corresponding author)DESY* ; CMS Collaboration (Collaboration author)DESY*

2024
SISSA Trieste

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Please use a persistent id in citations: doi:10.22323/1.449.0489  doi:10.3204/PUBDB-2024-04937

Report No.: CMS-CR-2023-204

Abstract: The search for lepton-flavor violating decays of the Higgs boson to an electron-muon pair using data from proton-proton collisions at $\sqrt{s} = 13$ TeV collected by the CMS experiment at the LHC is presented. The dataset corresponds to an integrated luminosity of $138 fb^{-1}$. No significant excess of events is observed for the 125 GeV Higgs. This analysis leads to the most stringent upper limits at 95\% confidence level so far on the branching fraction of the 125 GeV Higgs boson decaying into an electron and a muon, with an observed (expected) limit of 4.4 (4.7)$\times$10$^{-5}$. A search for additional scalar resonances, X, in the same decay channel, leads to upper limits on the cross-section of pp$\rightarrow$X$\rightarrow$e$\mu$ in the mass-range of 110-160 GeV. Here, an excess of events is observed at an electron-muon invariant mass of approximately 146 GeV with a local (global) significance of 3.8 (2.8) standard deviations. These results provide valuable insights into lepton-flavor-violating Higgs decays and contribute to our understanding of the Higgs boson sector and potential physics beyond the Standard Model.

Keyword(s): p p: colliding beams ; Higgs particle: rare decay ; Higgs particle: leptonic decay ; lepton: flavor: violation ; resonance: scalar ; p p: cross section ; p p: scattering ; mass spectrum: (electron muon) ; CMS ; muon ; new physics: search for ; Higgs particle: branching ratio: upper limit ; electron ; CERN LHC Coll ; experimental results ; Higgs particle --> electron muon ; 13000 GeV-cms

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Contributing Institute(s):

1. LHC/CMS Experiment (CMS)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. LHC: CMS

Appears in the scientific report 2024

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Poster Leyva Pernia, D. (Corresponding author)DESY* ; CMS Collaboration (Collaboration author)DESY*
Exploring Lepton-Flavor Violation (LFV) in $H e\mu$. earch for the LFV decay of the Higgs boson and additional Higgs bosons in the $e\mu$ final state
2023European Physical Society Conference on High Energy Physics 2023, EPS-HEP2023, HamburgHamburg, Germany, 21 Aug 2023 - 25 Aug 20232023-08-212023-08-25     Files  Fulltext BibTeX | EndNote: XML, Text | RIS

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