Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s = 8 TeV
The ratio of the top-quark branching fractions R=B(t→Wb)/B(t→Wq), where the denominator includes the sum over all down-type quarks (q=b,s,d), is measured in the t[¯ overt] dilepton final state with proton–proton collision data at √s=8 TeV from an integrated luminosity of 19.7 fb[superscript −1], col...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
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Elsevier BV
2018
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| Online Access: | http://hdl.handle.net/1721.1/117038 https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0002-7945-005X https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0002-2822-3375 https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-1136-6900 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0001-6332-5839 |
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| author | Apyan, Aram Barbieri, Richard Alexander Bauer, Gerry P Busza, Wit Cali, Ivan Amos Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Luckey Jr, P David Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E Roland, Gunther M Stephans, George S. F. Stoeckli, Fabian Sumorok, Konstanty C Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Wyslouch, Victoria Chan, M. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Apyan, Aram Barbieri, Richard Alexander Bauer, Gerry P Busza, Wit Cali, Ivan Amos Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Luckey Jr, P David Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E Roland, Gunther M Stephans, George S. F. Stoeckli, Fabian Sumorok, Konstanty C Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Wyslouch, Victoria Chan, M. |
| author_sort | Apyan, Aram |
| collection | MIT |
| description | The ratio of the top-quark branching fractions R=B(t→Wb)/B(t→Wq), where the denominator includes the sum over all down-type quarks (q=b,s,d), is measured in the t[¯ overt] dilepton final state with proton–proton collision data at √s=8 TeV from an integrated luminosity of 19.7 fb[superscript −1], collected with the CMS detector. In order to quantify the purity of the signal sample, the cross section is measured by fitting the observed jet multiplicity, thereby constraining the signal and background contributions. By counting the number of b jets per event, an unconstrained value of R=1.014±0.003(stat.)±0.032(syst.) is measured, in a good agreement with current precision measurements in electroweak and flavour sectors. A lower limit R > 0.955 at the 95% confidence level is obtained after requiring R≤1, and a lower limit on the Cabibbo–Kobayashi–Maskawa matrix element |V[subscript tb] | > 0.975 is set at 95% confidence level. The result is combined with a previous CMS measurement of the t-channel single-top-quark cross section to determine the top-quark total decay width, Γ[subscript t] =1.36±0.02(stat.) −0.11 +0.14 (syst.) GeV. |
| first_indexed | 2024-09-23T12:20:33Z |
| format | Article |
| id | mit-1721.1/117038 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T12:20:33Z |
| publishDate | 2018 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1170382023-02-26T11:19:37Z Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s = 8 TeV Apyan, Aram Barbieri, Richard Alexander Bauer, Gerry P Busza, Wit Cali, Ivan Amos Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Luckey Jr, P David Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E Roland, Gunther M Stephans, George S. F. Stoeckli, Fabian Sumorok, Konstanty C Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Wyslouch, Victoria Chan, M. Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Apyan, Aram Barbieri, Richard Alexander Bauer, Gerry P Busza, Wit Cali, Ivan Amos Chan, Matthew Hans Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Luckey Jr, P David Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E Roland, Gunther M Stephans, George S. F. Stoeckli, Fabian Sumorok, Konstanty C Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Wyslouch, Victoria The ratio of the top-quark branching fractions R=B(t→Wb)/B(t→Wq), where the denominator includes the sum over all down-type quarks (q=b,s,d), is measured in the t[¯ overt] dilepton final state with proton–proton collision data at √s=8 TeV from an integrated luminosity of 19.7 fb[superscript −1], collected with the CMS detector. In order to quantify the purity of the signal sample, the cross section is measured by fitting the observed jet multiplicity, thereby constraining the signal and background contributions. By counting the number of b jets per event, an unconstrained value of R=1.014±0.003(stat.)±0.032(syst.) is measured, in a good agreement with current precision measurements in electroweak and flavour sectors. A lower limit R > 0.955 at the 95% confidence level is obtained after requiring R≤1, and a lower limit on the Cabibbo–Kobayashi–Maskawa matrix element |V[subscript tb] | > 0.975 is set at 95% confidence level. The result is combined with a previous CMS measurement of the t-channel single-top-quark cross section to determine the top-quark total decay width, Γ[subscript t] =1.36±0.02(stat.) −0.11 +0.14 (syst.) GeV. National Science Foundation (U.S.) United States. Department of Energy 2018-07-20T19:35:44Z 2018-07-20T19:35:44Z 2014-07 2014-06 2018-05-11T15:28:15Z Article http://purl.org/eprint/type/JournalArticle 0370-2693 http://hdl.handle.net/1721.1/117038 Khachatryan, V., et al. “Measurement of the Ratio B (t → Wb/B (t → Wq) in Pp Collisions at √s = 8 TeV.” Physics Letters B, vol. 736, Sept. 2014, pp. 33–57. © 2014 The Authors https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0002-7945-005X https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0002-2822-3375 https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-1136-6900 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0001-6332-5839 http://dx.doi.org/10.1016/J.PHYSLETB.2014.06.076 Physics Letters B Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier BV Physics Letters B |
| spellingShingle | Apyan, Aram Barbieri, Richard Alexander Bauer, Gerry P Busza, Wit Cali, Ivan Amos Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Luckey Jr, P David Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E Roland, Gunther M Stephans, George S. F. Stoeckli, Fabian Sumorok, Konstanty C Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Wyslouch, Victoria Chan, M. Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s = 8 TeV |
| title | Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s = 8 TeV |
| title_full | Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s = 8 TeV |
| title_fullStr | Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s = 8 TeV |
| title_full_unstemmed | Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s = 8 TeV |
| title_short | Measurement of the ratio B(t → Wb)/B(t → Wq) in pp collisions at √s = 8 TeV |
| title_sort | measurement of the ratio b t wb b t wq in pp collisions at √s 8 tev |
| url | http://hdl.handle.net/1721.1/117038 https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0002-7945-005X https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0002-2822-3375 https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-1136-6900 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0001-6332-5839 |
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