KIT | KIT-Bibliothek | Impressum | Datenschutz

Search for the lepton flavor violating τ → 3μ decay in proton-proton collisions at $\sqrt s$ = 13 TeV

Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Mikulec, I.; Schieck, J.; Schöfbeck, R.; Schwarz, D.; Sonawane, M.; Templ, S.; ... mehr

Abstract:

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 (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.


Verlagsausgabe §
DOI: 10.5445/IR/1000170415
Veröffentlicht am 03.05.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Scientific Computing Center (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 06.2024
Sprache Englisch
Identifikator ISSN: 0370-2693, 0031-9163, 1873-2445
KITopen-ID: 1000170415
Erschienen in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Verlag North-Holland Publishing
Band 853
Seiten Art.-Nr.: 138633
Vorab online veröffentlicht am 10.04.2024
Nachgewiesen in Dimensions
Scopus
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page