Search for b hadron decays to long-lived particles in the CMS endcap muon detectors
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912829680910336 |
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| author | CMS Collaboration |
| author_facet | CMS Collaboration |
| contents | A search for long-lived particles originating from the decay of b hadrons produced in proton-proton collisions with a center-of-mass energy of 13 TeV at the LHC is presented. The analysis is performed on a data set recorded in 2018, corresponding to an integrated luminosity of 41.6 fb$^{-1}$. Interactions of the long-lived particles in the CMS endcap muon system would create hadronic or electromagnetic showers, producing clusters of detector hits. Selected events contain at least one such high-multiplicity cluster in the muon endcaps and require the presence of a displaced muon. The most stringent upper limits to date on the branching fraction $\mathcal{B}$(B $\to$ K$Φ$), where the long-lived particle $Φ$ decays to a pair of hadrons, are obtained for $Φ$ masses of 0.3$-$3.0 GeV and $Φ$ mean proper decay lengths in the range of 1$-$500 cm. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_06363 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Search for b hadron decays to long-lived particles in the CMS endcap muon detectors CMS Collaboration High Energy Physics - Experiment A search for long-lived particles originating from the decay of b hadrons produced in proton-proton collisions with a center-of-mass energy of 13 TeV at the LHC is presented. The analysis is performed on a data set recorded in 2018, corresponding to an integrated luminosity of 41.6 fb$^{-1}$. Interactions of the long-lived particles in the CMS endcap muon system would create hadronic or electromagnetic showers, producing clusters of detector hits. Selected events contain at least one such high-multiplicity cluster in the muon endcaps and require the presence of a displaced muon. The most stringent upper limits to date on the branching fraction $\mathcal{B}$(B $\to$ K$Φ$), where the long-lived particle $Φ$ decays to a pair of hadrons, are obtained for $Φ$ masses of 0.3$-$3.0 GeV and $Φ$ mean proper decay lengths in the range of 1$-$500 cm. |
| title | Search for b hadron decays to long-lived particles in the CMS endcap muon detectors |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2508.06363 |