Scientific Library of Tomsk State University

   Digital catalogue        

Search for lepton-flavor-violating decays of the Z boson into a τ lepton and a light lepton with the ATLAS detector M. Aaboud, G. Aad, B. Abbott [et al.]

Contributor(s): Aad, G | Abbott, B | Chelkov, G. A | Khodinov, A | Parida, B | Tsybychev, D | Vaniachine, A | Aaboud, MMaterial type: ArticleArticleSubject(s): ATLAS, детектор | Большой адронный коллайдер | протон-протонные столкновения | бозоны | лептоныGenre/Form: статьи в журналах Online resources: Click here to access online In: Physical Review D Vol. 98, № 9. P. 092010-1-092010-31Abstract: Direct searches for lepton flavor violation in decays of the Z boson with the ATLAS detector at the LHC are presented. Decays of the Z boson into an electron or muon and a hadronically decaying τ lepton are considered. The searches are based on a data sample of proton-proton collisions collected by the ATLAS detector in 2015 and 2016, corresponding to an integrated luminosity of 36.1  fb−1 at a center-of-mass energy of √s=13  TeV. No statistically significant excess of events above the expected background is observed, and upper limits on the branching ratios of lepton-flavor-violating decays are set at the 95% confidence level: B(Z→eτ)<5.8×10−5 and B(Z→μτ)<2.4×10−5. This is the first limit on B(Z→eτ) with ATLAS data. The upper limit on B(Z→μτ) is combined with a previous ATLAS result based on 20.3  fb−1 of proton-proton collision data at a center-of-mass energy of √s=8  TeV and the combined upper limit at 95% confidence level is B(Z→μτ)<1.3×10−5.
Tags from this library: No tags from this library for this title. Log in to add tags.
No physical items for this record

Библиогр.: 58 назв.

Direct searches for lepton flavor violation in decays of the Z boson with the ATLAS detector at the LHC are presented. Decays of the Z boson into an electron or muon and a hadronically decaying τ lepton are considered. The searches are based on a data sample of proton-proton collisions collected by the ATLAS detector in 2015 and 2016, corresponding to an integrated luminosity of 36.1  fb−1 at a center-of-mass energy of √s=13  TeV. No statistically significant excess of events above the expected background is observed, and upper limits on the branching ratios of lepton-flavor-violating decays are set at the 95% confidence level: B(Z→eτ)<5.8×10−5 and B(Z→μτ)<2.4×10−5. This is the first limit on B(Z→eτ) with ATLAS data. The upper limit on B(Z→μτ) is combined with a previous ATLAS result based on 20.3  fb−1 of proton-proton collision data at a center-of-mass energy of √s=8  TeV and the combined upper limit at 95% confidence level is B(Z→μτ)<1.3×10−5.

There are no comments on this title.

to post a comment.
Share