2016/01/31 by ATLAS Collaboration · 1 citation
Physics and Astronomy · #hep-ex
paper · pdf · doi:10.1140/epjc/s10052-016-4041-9
published as Eur. Phys. J. C (2016) 76:232 · 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/
arxiv created 2016/05/02 · arxiv updated 2016/05/03
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 τ lepton branching fraction into three muons, \rm Br(τ→ 3μ), is 3.76× 10-7 (3.94× 10-7) at 90% confidence level.