Study of top-quark production and decays involving a Tau Lepton at CDF and limits on a charged-Higgs Boson contribution

0522683 - FZÚ 2020 RIV US eng J - Článek v odborném periodiku
Aaltonen, T. - Amerio, S. - Amidei, D. - Lysák, Roman … celkem 400 autorů
Study of top-quark production and decays involving a Tau Lepton at CDF and limits on a charged-Higgs Boson contribution.
Physical Review D. Roč. 89, č. 9 (2014), s. 1-9, č. článku 091101. ISSN 2470-0010. E-ISSN 2470-0029
Institucionální podpora: RVO:68378271
Klíčová slova: Batavia TEVATRON Coll * CDF * p p --> top anti-top anything * top --> bottom tau neutrino/tau * top --> Higgs particle bottom * 1960 GeV-cms
Obor OECD: Particles and field physics
Impakt faktor: 4.643, rok: 2014
Způsob publikování: Omezený přístup
https://doi.org/10.1103/physrevd.89.091101

We present an analysis of top-antitop quark production and decay into a tau lepton, tau neutrino, and bottom quark using data from 9  fb-1 of integrated luminosity at the Collider Detector at Fermilab. Dilepton events, where one lepton is an energetic electron or muon and the other a hadronically decaying tau lepton, originating from proton-antiproton collisions at s=1.96  TeV, are used. A top-antitop quark production cross section of 8.1±2.1  pb is measured, assuming standard-model top quark decays. By separately identifying for the first time the single-tau and the ditau components, we measure the branching fraction of the top quark into the tau lepton, tau neutrino, and bottom quark to be (9.6±2.8)%. The branching fraction of top quark decays into a charged Higgs boson and a bottom quark, which would imply violation of lepton universality, is limited to be less than 5.9% at a 95% confidence level [for B(H-→τν¯)=1].
Trvalý link: http://hdl.handle.net/11104/0307131