Direct Measurement of the Total Decay Width of the Top Quark
We present a measurement of the total decay width of the top quark using events with top-antitop quark pair candidates reconstructed in the final state with one charged lepton and four or more hadronic jets. We use the full Tevatron run II data set of √s = 1.96 TeV proton-antiproton collisions reco...
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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/1721.1/84931 https://orcid.org/0000-0002-6047-4211 |
| _version_ | 1826209182327504896 |
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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 a measurement of the total decay width of the top quark using events with top-antitop quark pair candidates reconstructed in the final state with one charged lepton and four or more hadronic jets. We use the full Tevatron run II data set of √s = 1.96 TeV proton-antiproton collisions recorded by the CDF II detector. The top quark mass and the mass of the hadronically decaying W boson are reconstructed for each event and compared with distributions derived from simulated signal and background samples to extract the top quark width (Γ[subscript top]) and the energy scale of the calorimeter jets with in situ calibration. For a top quark mass M[subscript top] = 172.5 GeV/c[superscript 2], we find 1.10 < Γ[subscript top] < 4.05 GeV at 68% confidence level, which is in agreement with the standard model expectation of 1.3 GeV and is the most precise direct measurement of the top quark width to date. |
| first_indexed | 2024-09-23T14:18:48Z |
| format | Article |
| id | mit-1721.1/84931 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:18:48Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/849312022-09-29T08:35:09Z Direct Measurement of the Total Decay Width of the Top Quark 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 a measurement of the total decay width of the top quark using events with top-antitop quark pair candidates reconstructed in the final state with one charged lepton and four or more hadronic jets. We use the full Tevatron run II data set of √s = 1.96 TeV proton-antiproton collisions recorded by the CDF II detector. The top quark mass and the mass of the hadronically decaying W boson are reconstructed for each event and compared with distributions derived from simulated signal and background samples to extract the top quark width (Γ[subscript top]) and the energy scale of the calorimeter jets with in situ calibration. For a top quark mass M[subscript top] = 172.5 GeV/c[superscript 2], we find 1.10 < Γ[subscript top] < 4.05 GeV at 68% confidence level, which is in agreement with the standard model expectation of 1.3 GeV and is the most precise direct measurement of the top quark width to date. United States. Dept. of Energy National Science Foundation (U.S.) 2014-02-10T19:02:34Z 2014-02-10T19:02:34Z 2013-11 2013-08 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/84931 Aaltonen, T., S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, et al. “Direct Measurement of the Total Decay Width of the Top Quark.” Physical Review Letters 111, no. 20 (November 2013). © 2013 American Physical Society https://orcid.org/0000-0002-6047-4211 en_US http://dx.doi.org/10.1103/PhysRevLett.111.202001 Physical Review Letters 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. Direct Measurement of the Total Decay Width of the Top Quark |
| title | Direct Measurement of the Total Decay Width of the Top Quark |
| title_full | Direct Measurement of the Total Decay Width of the Top Quark |
| title_fullStr | Direct Measurement of the Total Decay Width of the Top Quark |
| title_full_unstemmed | Direct Measurement of the Total Decay Width of the Top Quark |
| title_short | Direct Measurement of the Total Decay Width of the Top Quark |
| title_sort | direct measurement of the total decay width of the top quark |
| url | http://hdl.handle.net/1721.1/84931 https://orcid.org/0000-0002-6047-4211 |
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