Upper limits on branching ratios of the lepton-flavor-violating decays τ →ℓγγ and τ →ℓX

Douglas Bryman; Shintaro Ito; Robert Shrock

doi:10.1103/PhysRevD.104.075032

Upper limits on branching ratios of the lepton-flavor-violating decays τ →ℓγγ and τ →ℓX

Douglas Bryman
, Shintaro Ito
, Robert Shrock

Institute for Theoretical Physics

Stony Brook University

University of British Columbia
TRIUMF
High Energy Accelerator Research Organization, Tsukuba

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

8 Scopus citations

Abstract

From analysis of data produced by the BABAR experiment, the first upper bounds (90% C.L.) were obtained on the branching ratios Br(τ→eγγ)<2.5×10-4 and Br(τ→μγγ)<5.8×10-4. In addition, improved upper bounds (95% C.L.) were found on branching ratios Br(τ→eX)<1.4×10-3 and Br(τ→μX)<2.0×10-3, where X is an undetected weakly interacting boson with mass mX<1.6 GeV/c2.

Original language	English
Article number	075032
Journal	Physical Review D
Volume	104
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevD.104.075032
State	Published - Oct 1 2021

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10.1103/PhysRevD.104.075032

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title = "Upper limits on branching ratios of the lepton-flavor-violating decays τ →ℓγγ and τ →ℓX",

abstract = "From analysis of data produced by the BABAR experiment, the first upper bounds (90\% C.L.) were obtained on the branching ratios Br(τ→eγγ)<2.5×10-4 and Br(τ→μγγ)<5.8×10-4. In addition, improved upper bounds (95\% C.L.) were found on branching ratios Br(τ→eX)<1.4×10-3 and Br(τ→μX)<2.0×10-3, where X is an undetected weakly interacting boson with mass mX<1.6 GeV/c2.",

author = "Douglas Bryman and Shintaro Ito and Robert Shrock",

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doi = "10.1103/PhysRevD.104.075032",

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AU - Ito, Shintaro

AU - Shrock, Robert

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N2 - From analysis of data produced by the BABAR experiment, the first upper bounds (90% C.L.) were obtained on the branching ratios Br(τ→eγγ)<2.5×10-4 and Br(τ→μγγ)<5.8×10-4. In addition, improved upper bounds (95% C.L.) were found on branching ratios Br(τ→eX)<1.4×10-3 and Br(τ→μX)<2.0×10-3, where X is an undetected weakly interacting boson with mass mX<1.6 GeV/c2.

AB - From analysis of data produced by the BABAR experiment, the first upper bounds (90% C.L.) were obtained on the branching ratios Br(τ→eγγ)<2.5×10-4 and Br(τ→μγγ)<5.8×10-4. In addition, improved upper bounds (95% C.L.) were found on branching ratios Br(τ→eX)<1.4×10-3 and Br(τ→μX)<2.0×10-3, where X is an undetected weakly interacting boson with mass mX<1.6 GeV/c2.

UR - https://www.scopus.com/pages/publications/85119408174

U2 - 10.1103/PhysRevD.104.075032

DO - 10.1103/PhysRevD.104.075032

M3 - Article

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JO - Physical Review D

JF - Physical Review D

IS - 7

M1 - 075032

ER -

Upper limits on branching ratios of the lepton-flavor-violating decays τ →ℓγγ and τ →ℓX

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