Search for the lepton flavour violating decay $B^+ \rightarrow K^+ \mu^- \tau^+$ using $B_{s2}^{*0}$ decays

Aaij, Roel; Abellán Beteta, Carlos; Ackernley, Thomas; Adeva, Bernardo; Adinolfi, Marco; Afsharnia, Hossein; Aidala, Christine Angela; Aiola, Salvatore; Ajaltouni, Ziad; Akar, Simon

doi:10.1007/JHEP06(2020)129

Search for the lepton flavour violating decay $B^+ \rightarrow K^+ \mu^- \tau^+$ using $B_{s2}^{*0}$ decays

LHCb

Collaboration

Mar 9, 2020

19 pages

Published in:

JHEP 06 (2020) 129

Published: Jun 22, 2020

e-Print:

2003.04352 [hep-ex]

DOI:

10.1007/JHEP06(2020)129

PDG:

{{\mathit B}^{+}}

\rightarrow

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

Report number:

LHCb-PAPER-2019-043,
CERN-EP-2020-020

Experiments:

CERN-LHC-LHCb

View in:

reference search61 citations

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Abstract: (Springer)

A search is presented for the lepton flavour violating decay B

^{+}

→ K

^{+}

μ

^{−}

τ

^{+}

using a sample of proton-proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, collected with the LHCb detector and corresponding to a total integrated luminosity of 9 fb

^{−1}

. The τ leptons are selected inclusively, primarily via decays with a single charged particle. The four-momentum of the τ lepton is determined by using B

^{+}

mesons from

{B}_{s2}^{\ast 0}\to {B}^{+}{K}^{-}

decays. No significant excess is observed, and an upper limit is set on the branching fractionℬ(B

^{+}

→ K

^{+}

μ

^{−}

τ

^{+}

) < 3.9 × 10

^{−5}

at 90 % confidence level.The obtained limit is comparable to the world-best limit.[graphic not available: see fulltext]

Note:

All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-043.html (LHCb public pages)

B physics
Beyond Standard Model
Flavor physics
Hadron-Hadron scattering (experiments)
Rare decay
new physics
lepton: flavor: violation
CERN LHC Coll
LHC-B
B+: production

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Figures(9)

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