Search for the lepton flavor violating τ → 3μ decay in proton-proton collisions at <math altimg="si1.svg"><msqrt><mrow><mi>s</mi></mrow></msqrt><mo linebreak="goodbreak" linebreakstyle="after">=</mo><mn>13</mn><mspace width="0.2em"/><mtext>TeV</mtext></math> - INSPIRE

DataBETA

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

CMS

Collaboration

Dec 4, 2023

39 pages

Published in:

Phys.Lett.B 853 (2024) 138633

Published: Apr 10, 2024

e-Print:

2312.02371 [hep-ex]

DOI:

10.1016/j.physletb.2024.138633 (publication)

Report number:

CMS-BPH-21-005,
CERN-EP-2023-249

Experiments:

CERN-LHC-CMS

View in:

reference search12 citations

Citations per year

Abstract: (Elsevier B.V.)

A search for the lepton flavor violating

τ \to 3 μ

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 \to 3 μ)

at confidence levels of 90 and 95% are

2.9 \times 10^{- 8}

(

2.4 \times 10^{- 8}

) and

3.6 \times 10^{- 8}

(

3.0 \times 10^{- 8}

), respectively.

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/BPH-21-005 (CMS Public Pages)

CMS
BSM
CLFV
Charged lepton flavor violation
p p: scattering
p p: colliding beams
W: leptonic decay
tau: particle identification
lepton: flavor: violation
tau: leptonic decay

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