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 dataset 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 B(B -> K Phi), where the long-lived particle Phi decays to a pair of hadrons, are obtained for Phi masses of 0.3-3.0 GeV and Phi mean proper decay lengths in the range of 1-500 cm.

Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., Benato, L., et al. (2026). Search for b-hadron decays to long-lived particles in the CMS endcap muon detectors. PHYSICAL REVIEW D, 113(1) [10.1103/7ldn-snzn].

Search for b-hadron decays to long-lived particles in the CMS endcap muon detectors

Ciocci, M. A.;Turini, N.;
2026-01-01

Abstract

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 dataset 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 B(B -> K Phi), where the long-lived particle Phi decays to a pair of hadrons, are obtained for Phi masses of 0.3-3.0 GeV and Phi mean proper decay lengths in the range of 1-500 cm.
2026
Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., Benato, L., et al. (2026). Search for b-hadron decays to long-lived particles in the CMS endcap muon detectors. PHYSICAL REVIEW D, 113(1) [10.1103/7ldn-snzn].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1324477