Search for the Lepton Flavor Violating τ → 3μ Decay in Proton-Proton Collisions at √s = 13 TeV

Physics Letters B 2024
Kārlis Dreimanis, Antra Gaile, Guntis Pikurs, Andris Potrebko, Markus Seidel, Viesturs Veckalns, CMS Collaboration

A search for the lepton flavor violating τ→3μ decay is performed using proton-proton collision events at a center-of-mass energy of 13 TeV collected by the CMS experiment at the LHC in 2017–2018, corresponding to an integrated luminosity of 97.7 fb−1. Tau leptons produced in both heavy-flavor hadron and W boson decays are exploited in the analysis. No evidence for the decay is observed. The results of this search are combined with an earlier null result based on data collected in 2016 to obtain a total integrated luminosity of 131 fb−1. The observed (expected) upper limits on the branching fraction B(τ→3μ) at confidence levels of 90 and 95% are 2.9×10−8 (2.4×10−8) and 3.6×10−8 (3.0×10−8), respectively.

Atslēgas vārdi
BSM | Charged lepton flavor violation | CLFV | CMS
DOI
10.1016/j.physletb.2024.138633
Hipersaite
https://www.sciencedirect.com/science/article/pii/S0370269324001916

The CMS Collaboration, A.Tumasyan, K.Dreimanis, A.Gaile, G.Pikurs, A.Potrebko, M.Seidel, V.Veckalns ... [et al.]. Search for the Lepton Flavor Violating τ → 3μ Decay in Proton-Proton Collisions at √s = 13 TeV. Physics Letters B, 2024, Vol. 853, Article number 138633. ISSN 0370-2693. Pieejams: doi:10.1016/j.physletb.2024.138633

Publikācijas valoda
English (en)