Search for baryon number violation in top-quark decays
A search for baryon number violation (BNV) in top-quark decays is performed using pp collisions produced by the LHC at [sqrt s]=8 TeV. The top-quark decay considered in this search results in one light lepton (muon or electron), two jets, but no neutrino in the final state. Data used for the analysi...
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| Format: | Article |
| Language: | en_US |
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Elsevier B.V.
2014
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| Online Access: | http://hdl.handle.net/1721.1/88617 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0002-1136-6900 |
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| author | CMS Collaboration Apyan, Aram Bauer, Gerry P. Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Kim, Y. Klute, Markus Lai, Yue Shi Levin, Andrew Michael Ma, Teng Nahn, Steven 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 Wolf, R. Wyslouch, Boleslaw Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Zhukova, Victoria Luckey, P. David, Jr. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics CMS Collaboration Apyan, Aram Bauer, Gerry P. Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Kim, Y. Klute, Markus Lai, Yue Shi Levin, Andrew Michael Ma, Teng Nahn, Steven 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 Wolf, R. Wyslouch, Boleslaw Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Zhukova, Victoria Luckey, P. David, Jr. |
| author_sort | CMS Collaboration |
| collection | MIT |
| description | A search for baryon number violation (BNV) in top-quark decays is performed using pp collisions produced by the LHC at [sqrt s]=8 TeV. The top-quark decay considered in this search results in one light lepton (muon or electron), two jets, but no neutrino in the final state. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.5 fb[superscript −1]. The event selection is optimized for top quarks produced in pairs, with one undergoing the BNV decay and the other the standard model hadronic decay to three jets. No significant excess of events over the expected yield from standard model processes is observed. The upper limits at 95% confidence level on the branching fraction of the BNV top-quark decay are calculated to be 0.0016 and 0.0017 for the muon and the electron channels, respectively. Assuming lepton universality, an upper limit of 0.0015 results from the combination of the two channels. These limits are the first that have been obtained on a BNV process involving the top quark. |
| first_indexed | 2024-09-23T08:45:43Z |
| format | Article |
| id | mit-1721.1/88617 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:45:43Z |
| publishDate | 2014 |
| publisher | Elsevier B.V. |
| record_format | dspace |
| spelling | mit-1721.1/886172023-02-26T08:00:05Z Search for baryon number violation in top-quark decays CMS Collaboration Apyan, Aram Bauer, Gerry P. Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Kim, Y. Klute, Markus Lai, Yue Shi Levin, Andrew Michael Ma, Teng Nahn, Steven 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 Wolf, R. Wyslouch, Boleslaw Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Zhukova, Victoria Luckey, P. David, Jr. Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Apyan, Aram Bauer, Gerry P. Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Kim, Y. Klute, Markus Lai, Yue Shi Levin, Andrew Michael Luckey, P. David Ma, Teng Nahn, Steven 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 Wolf, R. Wyslouch, Boleslaw Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Zhukova, Victoria A search for baryon number violation (BNV) in top-quark decays is performed using pp collisions produced by the LHC at [sqrt s]=8 TeV. The top-quark decay considered in this search results in one light lepton (muon or electron), two jets, but no neutrino in the final state. Data used for the analysis were collected by the CMS detector and correspond to an integrated luminosity of 19.5 fb[superscript −1]. The event selection is optimized for top quarks produced in pairs, with one undergoing the BNV decay and the other the standard model hadronic decay to three jets. No significant excess of events over the expected yield from standard model processes is observed. The upper limits at 95% confidence level on the branching fraction of the BNV top-quark decay are calculated to be 0.0016 and 0.0017 for the muon and the electron channels, respectively. Assuming lepton universality, an upper limit of 0.0015 results from the combination of the two channels. These limits are the first that have been obtained on a BNV process involving the top quark. National Science Foundation (U.S.) United States. Dept. of Energy Alfred P. Sloan Foundation 2014-08-08T15:42:57Z 2014-08-08T15:42:57Z 2014-04 2014-02 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/88617 “Search for Baryon Number Violation in Top-Quark Decays.” Physics Letters B 731 (April 2014): 173–196. https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0002-1136-6900 en_US http://dx.doi.org/10.1016/j.physletb.2014.02.033 Physics Letters B Creative Commons Attribution http://creativecommons.org/licenses/by/3.0/ application/pdf Elsevier B.V. Elsevier |
| spellingShingle | CMS Collaboration Apyan, Aram Bauer, Gerry P. Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Kim, Y. Klute, Markus Lai, Yue Shi Levin, Andrew Michael Ma, Teng Nahn, Steven 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 Wolf, R. Wyslouch, Boleslaw Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Zhukova, Victoria Luckey, P. David, Jr. Search for baryon number violation in top-quark decays |
| title | Search for baryon number violation in top-quark decays |
| title_full | Search for baryon number violation in top-quark decays |
| title_fullStr | Search for baryon number violation in top-quark decays |
| title_full_unstemmed | Search for baryon number violation in top-quark decays |
| title_short | Search for baryon number violation in top-quark decays |
| title_sort | search for baryon number violation in top quark decays |
| url | http://hdl.handle.net/1721.1/88617 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0002-1136-6900 |
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