Search for lepton-number-violating B− →𝐷(*)+μ−μ− decays

LHCb Collaboration

doi:10.1103/r27c-9ghw

Search for lepton-number-violating B⁻ →𝐷^(*)+μ⁻μ⁻ decays

LHCb Collaboration

Physics and Astronomy

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Abstract

A search is performed for lepton-number-violating 𝐵⁻→𝐷^(*)+⁢𝜇−⁢𝜇− decays, using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb⁻¹. No significant signal is observed, and upper limits are set on the branching fractions, ℬ⁡(𝐵⁻→𝐷⁺⁢𝜇⁻⁢𝜇⁻) < 4.6 × 10⁻⁸ and ℬ⁡(𝐵⁻→𝐷^*+⁢𝜇⁻⁢𝜇⁻) < 5.9 × 10⁻⁸, at the 95% confidence level.

Original language	English
Article number	092006
Number of pages	14
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	113
DOIs	https://doi.org/10.1103/r27c-9ghw
Publication status	Published - 12 May 2026

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@article{2389a2c7389b49fea3f4d41eeb1930f6,

title = "Search for lepton-number-violating B− →𝐷(*)+μ−μ− decays",

abstract = "A search is performed for lepton-number-violating 𝐵− →𝐷(*)+⁢𝜇−⁢𝜇− decays, using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. No significant signal is observed, and upper limits are set on the branching fractions, ℬ⁡(𝐵−→𝐷+⁢𝜇−⁢𝜇−) < 4.6 × 10−8 and ℬ⁡(𝐵−→𝐷*+⁢𝜇−⁢𝜇−) < 5.9 × 10−8, at the 95\% confidence level.",

author = "\{LHCb Collaboration\} and C. Jayaweera and D. Johnson and C. Lazzeroni and N. Sahoo and M.W. Slater and D.J.D. Thompson and F.C. Volle and N.K. Watson and E. Whiter",

year = "2026",

month = may,

day = "12",

doi = "10.1103/r27c-9ghw",

language = "English",

volume = "113",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "2470-0010",

publisher = "American Physical Society (APS)",

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TY - JOUR

T1 - Search for lepton-number-violating B− →𝐷(*)+μ−μ− decays

AU - LHCb Collaboration

AU - Jayaweera, C.

AU - Johnson, D.

AU - Lazzeroni, C.

AU - Sahoo, N.

AU - Slater, M.W.

AU - Thompson, D.J.D.

AU - Volle, F.C.

AU - Watson, N.K.

AU - Whiter, E.

PY - 2026/5/12

Y1 - 2026/5/12

N2 - A search is performed for lepton-number-violating 𝐵− →𝐷(*)+⁢𝜇−⁢𝜇− decays, using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. No significant signal is observed, and upper limits are set on the branching fractions, ℬ⁡(𝐵−→𝐷+⁢𝜇−⁢𝜇−) < 4.6 × 10−8 and ℬ⁡(𝐵−→𝐷*+⁢𝜇−⁢𝜇−) < 5.9 × 10−8, at the 95% confidence level.

AB - A search is performed for lepton-number-violating 𝐵− →𝐷(*)+⁢𝜇−⁢𝜇− decays, using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb−1. No significant signal is observed, and upper limits are set on the branching fractions, ℬ⁡(𝐵−→𝐷+⁢𝜇−⁢𝜇−) < 4.6 × 10−8 and ℬ⁡(𝐵−→𝐷*+⁢𝜇−⁢𝜇−) < 5.9 × 10−8, at the 95% confidence level.

U2 - 10.1103/r27c-9ghw

DO - 10.1103/r27c-9ghw

M3 - Article

SN - 2470-0010

VL - 113

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

M1 - 092006

ER -

Search for lepton-number-violating B− →𝐷(*)+μ−μ− decays

Abstract

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Search for lepton-number-violating B⁻ →𝐷^(*)+μ⁻μ⁻ decays