Search for the lepton flavour violating decay τ$^{−}$ → μ$^{−}$ μ$^{+}$ μ$^{−}$ - INSPIRE

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Search for the lepton flavour violating decay τ $^{−}$ → μ $^{−}$ μ $^{+}$ μ $^{−}$

LHCb

Collaboration

Sep 30, 2014

19 pages

Published in:

JHEP 02 (2015) 121

Published: Feb 18, 2015

e-Print:

1409.8548 [hep-ex]

DOI:

10.1007/JHEP02(2015)121

PDG:

{{\mathit \tau}^{-}}

\rightarrow

{{\mathit \mu}^{-}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}

Report number:

LHCB-PAPER-2014-052,
CERN-PH-EP-2014-236

Experiments:

CERN-LHC-LHCb

View in:

reference search122 citations

Citations per year

Abstract: (Springer)

A search for the lepton flavour violating decay τ

^{−}

→ μ

^{−}

μ

^{+}

μ

^{−}

is performed with the LHCb experiment. The data sample corresponds to an integrated luminosity of 1.0 fb

^{−1}

of proton-proton collisions at a centre-of-mass energy of 7 TeV and 2.0 fb

^{−1}

at 8 TeV. No evidence is found for a signal, and a limit is set at 90% confidence level on the branching fraction,

\mathrm{\mathcal{B}}\left({\tau}^{-}\to {\mu}^{-}{\mu}^{+}{\mu}^{-}\right)<4.6\times {10}^{-8}

.

Note:

20 pages, 10 figures, published as JHEP 02 (2015) 121

Rare decay
Tau Physics
Hadron-Hadron Scattering
p p: scattering
p p: colliding beams
lepton: flavor: violation
final state: (3lepton)
tau: leptonic decay
tau: branching ratio: upper limit
experimental results

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