Search for Lepton-Flavor Violating Decays B+ → K+μ±e∓

Peter Clarke; Robert Currie; Stephan Eisenhardt; Silvia Gambetta; Franz Muheim; Matthew Needham; Marco Pappagallo; Mark Williams; LHCb Collaboration

doi:10.1103/PhysRevLett.123.241802

Search for Lepton-Flavor Violating Decays B⁺ → K⁺μ±e∓

Peter Clarke, Robert Currie, Stephan Eisenhardt, Silvia Gambetta, Franz Muheim, Matthew Needham, Marco Pappagallo, Mark Williams, LHCb Collaboration

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

A search for the lepton-flavor violating decays B+→K+μ±e∓ is performed using a sample of proton-proton collision data, collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3 fb-1. No significant signal is observed, and upper limits on the branching fractions are set as B(B+→K+μ-e+)<7.0(9.5)×10-9 and B(B+→K+μ+e-)<6.4(8.8)×10-9 at 90% (95)% confidence level. The results improve the current best limits on these decays by more than one order of magnitude.

Original language	English
Article number	241802
Journal	Physical Review Letters
Volume	123
Issue number	24
Early online date	12 Dec 2019
DOIs	https://doi.org/10.1103/PhysRevLett.123.241802
Publication status	Published - 13 Dec 2019

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10.1103/PhysRevLett.123.241802

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title = "Search for Lepton-Flavor Violating Decays B+ → K+μ±e∓",

abstract = "A search for the lepton-flavor violating decays B+→K+μ±e∓ is performed using a sample of proton-proton collision data, collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3 fb-1. No significant signal is observed, and upper limits on the branching fractions are set as B(B+→K+μ-e+)<7.0(9.5)×10-9 and B(B+→K+μ+e-)<6.4(8.8)×10-9 at 90\% (95)\% confidence level. The results improve the current best limits on these decays by more than one order of magnitude.",

author = "Peter Clarke and Robert Currie and Stephan Eisenhardt and Silvia Gambetta and Franz Muheim and Matthew Needham and Marco Pappagallo and Mark Williams and LHCb Collaboration",

note = "Acceptance date not found on publisher site but needed in order to add gold 'exception'. Used date received.",

year = "2019",

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day = "13",

doi = "10.1103/PhysRevLett.123.241802",

language = "English",

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T1 - Search for Lepton-Flavor Violating Decays B+ → K+μ±e∓

AU - Clarke, Peter

AU - Currie, Robert

AU - Eisenhardt, Stephan

AU - Gambetta, Silvia

AU - Muheim, Franz

AU - Needham, Matthew

AU - Pappagallo, Marco

AU - Williams, Mark

AU - Collaboration, LHCb

N1 - Acceptance date not found on publisher site but needed in order to add gold 'exception'. Used date received.

PY - 2019/12/13

Y1 - 2019/12/13

N2 - A search for the lepton-flavor violating decays B+→K+μ±e∓ is performed using a sample of proton-proton collision data, collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3 fb-1. No significant signal is observed, and upper limits on the branching fractions are set as B(B+→K+μ-e+)<7.0(9.5)×10-9 and B(B+→K+μ+e-)<6.4(8.8)×10-9 at 90% (95)% confidence level. The results improve the current best limits on these decays by more than one order of magnitude.

AB - A search for the lepton-flavor violating decays B+→K+μ±e∓ is performed using a sample of proton-proton collision data, collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponding to an integrated luminosity of 3 fb-1. No significant signal is observed, and upper limits on the branching fractions are set as B(B+→K+μ-e+)<7.0(9.5)×10-9 and B(B+→K+μ+e-)<6.4(8.8)×10-9 at 90% (95)% confidence level. The results improve the current best limits on these decays by more than one order of magnitude.

U2 - 10.1103/PhysRevLett.123.241802

DO - 10.1103/PhysRevLett.123.241802

M3 - Article

SN - 0031-9007

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

M1 - 241802

ER -

Search for Lepton-Flavor Violating Decays B+ → K+μ±e∓

Abstract

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Search for Lepton-Flavor Violating Decays B⁺ → K⁺μ±e∓