Study of top quark production and decays involving a tau lepton at CDF and limits on a charged Higgs boson contribution
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[superscript −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 h...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/88996 https://orcid.org/0000-0002-6047-4211 |
| _version_ | 1811091830525132800 |
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| author | Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. |
| author_sort | Gomez-Ceballos, Guillelmo |
| collection | MIT |
| description | 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[superscript −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[superscript −] → τ[bar over ν]) = 1]. |
| first_indexed | 2024-09-23T15:08:43Z |
| format | Article |
| id | mit-1721.1/88996 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:08:43Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/889962022-10-02T00:51:39Z Study of top quark production and decays involving a tau lepton at CDF and limits on a charged Higgs boson contribution Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. 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[superscript −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[superscript −] → τ[bar over ν]) = 1]. United States. Dept. of Energy National Science Foundation (U.S.) Alfred P. Sloan Foundation 2014-08-22T17:58:39Z 2014-08-22T17:58:39Z 2014-05 2014-02 Article http://purl.org/eprint/type/JournalArticle 1550-7998 1550-2368 http://hdl.handle.net/1721.1/88996 Aaltonen, T., S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, et al. “Study of Top Quark Production and Decays Involving a Tau Lepton at CDF and Limits on a Charged Higgs Boson Contribution.” Phys. Rev. D 89, no. 9 (May 2014). © 2014 American Physical Society https://orcid.org/0000-0002-6047-4211 en_US http://dx.doi.org/10.1103/PhysRevD.89.091101 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society American Physical Society |
| spellingShingle | Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Study of top quark production and decays involving a tau lepton at CDF and limits on a charged Higgs boson contribution |
| title | Study of top quark production and decays involving a tau lepton at CDF and limits on a charged Higgs boson contribution |
| title_full | Study of top quark production and decays involving a tau lepton at CDF and limits on a charged Higgs boson contribution |
| title_fullStr | Study of top quark production and decays involving a tau lepton at CDF and limits on a charged Higgs boson contribution |
| title_full_unstemmed | Study of top quark production and decays involving a tau lepton at CDF and limits on a charged Higgs boson contribution |
| title_short | Study of top quark production and decays involving a tau lepton at CDF and limits on a charged Higgs boson contribution |
| title_sort | study of top quark production and decays involving a tau lepton at cdf and limits on a charged higgs boson contribution |
| url | http://hdl.handle.net/1721.1/88996 https://orcid.org/0000-0002-6047-4211 |
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