Probing lepton flavour violation via neutrinoless τ⟶3μ decays with the ATLAS detector

ATLAS Collaboration

doi:10.1140/epjc/s10052-016-4041-9

Probing lepton flavour violation via neutrinoless τ⟶3μ decays with the ATLAS detector

ATLAS Collaboration

Physics and Astronomy

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Abstract

This article presents the sensitivity of the ATLAS experiment to the lepton-flavour-violating decays of τ→3μ . A method utilising the production of τ leptons via W→τν decays is used. This method is applied to the sample of 20.3 fb ⁻¹ of pp collision data at a centre-of-mass energy of 8 TeV collected by the ATLAS experiment at the LHC in 2012. No event is observed passing the selection criteria, and the observed (expected) upper limit on the ττ lepton branching fraction into three muons, Br(τ→3μ)Br(τ→3μ) , is 3.76×10−73.76×10^{−7 (} 3.94×10−73.94×10⁻⁷) at 90 % confidence level.

Original language	English
Journal	Eur. Phys. J. C
Volume	76
Issue number	5
DOIs	https://doi.org/10.1140/epjc/s10052-016-4041-9
Publication status	Published - May 2016

Bibliographical note

21 pages plus author list + cover pages (39 pages total), 6 figures, 2 tables, submitted to EPJC, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2014-14/

Keywords

hep-ex

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Cite this

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title = "Probing lepton flavour violation via neutrinoless τ⟶3μ decays with the ATLAS detector",

abstract = "This article presents the sensitivity of the ATLAS experiment to the lepton-flavour-violating decays of τ→3μ . A method utilising the production of τ leptons via W→τν decays is used. This method is applied to the sample of 20.3 fb −1 of pp collision data at a centre-of-mass energy of 8 TeV collected by the ATLAS experiment at the LHC in 2012. No event is observed passing the selection criteria, and the observed (expected) upper limit on the ττ lepton branching fraction into three muons, Br(τ→3μ)Br(τ→3μ) , is 3.76×10−73.76×10−7 ( 3.94×10−73.94×10−7 ) at 90 % confidence level.",

keywords = "hep-ex",

author = "{ATLAS Collaboration} and Paul Newman",

note = "21 pages plus author list + cover pages (39 pages total), 6 figures, 2 tables, submitted to EPJC, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2014-14/",

year = "2016",

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doi = "10.1140/epjc/s10052-016-4041-9",

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AU - ATLAS Collaboration

AU - Newman, Paul

N1 - 21 pages plus author list + cover pages (39 pages total), 6 figures, 2 tables, submitted to EPJC, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2014-14/

PY - 2016/5

Y1 - 2016/5

N2 - This article presents the sensitivity of the ATLAS experiment to the lepton-flavour-violating decays of τ→3μ . A method utilising the production of τ leptons via W→τν decays is used. This method is applied to the sample of 20.3 fb −1 of pp collision data at a centre-of-mass energy of 8 TeV collected by the ATLAS experiment at the LHC in 2012. No event is observed passing the selection criteria, and the observed (expected) upper limit on the ττ lepton branching fraction into three muons, Br(τ→3μ)Br(τ→3μ) , is 3.76×10−73.76×10−7 ( 3.94×10−73.94×10−7 ) at 90 % confidence level.

AB - This article presents the sensitivity of the ATLAS experiment to the lepton-flavour-violating decays of τ→3μ . A method utilising the production of τ leptons via W→τν decays is used. This method is applied to the sample of 20.3 fb −1 of pp collision data at a centre-of-mass energy of 8 TeV collected by the ATLAS experiment at the LHC in 2012. No event is observed passing the selection criteria, and the observed (expected) upper limit on the ττ lepton branching fraction into three muons, Br(τ→3μ)Br(τ→3μ) , is 3.76×10−73.76×10−7 ( 3.94×10−73.94×10−7 ) at 90 % confidence level.

KW - hep-ex

U2 - 10.1140/epjc/s10052-016-4041-9

DO - 10.1140/epjc/s10052-016-4041-9

M3 - Article

SN - 1434-6044

VL - 76

JO - Eur. Phys. J. C

JF - Eur. Phys. J. C

IS - 5

ER -

Probing lepton flavour violation via neutrinoless τ⟶3μ decays with the ATLAS detector

Abstract

Bibliographical note

Keywords

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