A search for the lepton-flavour-violating decay τ− → μ−μ+μ− is carried out using data collected by the LHCb experiment between 2016 and 2018 in proton-proton collisions at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. An upper limit of 1.9 (2.3) × 10−8 is set at the 90% (95%) confidence level on the branching fraction of the decay.

Null, N., Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., et al. (2026). Search for τ− → μ−μ+μ− decays at the LHCb experiment with Run 2 data. JOURNAL OF HIGH ENERGY PHYSICS, 2026(9) [10.1007/jhep09(2026)069].

Search for τ− → μ−μ+μ− decays at the LHCb experiment with Run 2 data

Anelli, A.;Arnone, L.;Borsato, M.;Calvi, M.;Capelli, S.;Carniti, P.;Falcao, L. N.;Fazzini, D.;Gotti, C.;Kirsebom, V. S.;Malentacca, L.;Martinazzoli, L.;Martinelli, M.;Minotti, A.;Moro, A.;Pizzichemi, M.;Salomoni, M.;
2026

Abstract

A search for the lepton-flavour-violating decay τ− → μ−μ+μ− is carried out using data collected by the LHCb experiment between 2016 and 2018 in proton-proton collisions at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. An upper limit of 1.9 (2.3) × 10−8 is set at the 90% (95%) confidence level on the branching fraction of the decay.
Articolo in rivista - Articolo scientifico
Beyond Standard Model; Hadron-Hadron Scattering; Rare Decay; Tau Physics;
English
4-set-2026
2026
2026
9
69
open
Null, N., Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinén, F., Ackernley, T., et al. (2026). Search for τ− → μ−μ+μ− decays at the LHCb experiment with Run 2 data. JOURNAL OF HIGH ENERGY PHYSICS, 2026(9) [10.1007/jhep09(2026)069].
File in questo prodotto:
File Dimensione Formato  
Aaij et al-2026- J. High Energ. Phys-VoR.pdf

accesso aperto

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Licenza: Creative Commons
Dimensione 765.96 kB
Formato Adobe PDF
765.96 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/628865
Citazioni
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
Social impact