Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at √s = 8 TeV
A search for pair production of third-generation scalar leptoquarks and supersymmetric top quark partners, top squarks, in final states involving tau leptons and bottom quarks is presented. The search uses events from a data sample of proton–proton collisions corresponding to an integrated luminosit...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Elsevier B.V.
2015
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| Online Access: | http://hdl.handle.net/1721.1/95797 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/0000-0002-7945-005X https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0003-2593-7767 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 Barbieri, Richard Alexander Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics CMS Collaboration Apyan, Aram Barbieri, Richard Alexander Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David |
| author_sort | CMS Collaboration |
| collection | MIT |
| description | A search for pair production of third-generation scalar leptoquarks and supersymmetric top quark partners, top squarks, in final states involving tau leptons and bottom quarks is presented. The search uses events from a data sample of proton–proton collisions corresponding to an integrated luminosity of 19.7 fb−1, collected with the CMS detector at the LHC with View the MathML sources=8 TeV. The number of observed events is found to be in agreement with the expected standard model background. Third-generation scalar leptoquarks with masses below 740 GeV are excluded at 95% confidence level, assuming a 100% branching fraction for the leptoquark decay to a tau lepton and a bottom quark. In addition, this mass limit applies directly to top squarks decaying via an R-parity violating coupling View the MathML sourceλ333′. The search also considers a similar signature from top squarks undergoing a chargino-mediated decay involving the R-parity violating coupling View the MathML sourceλ3jk′. Each top squark decays to a tau lepton, a bottom quark, and two light quarks. Top squarks in this model with masses below 580 GeV are excluded at 95% confidence level. The constraint on the leptoquark mass is the most stringent to date, and this is the first search for top squarks decaying via sourceλ3jk′ |
| first_indexed | 2024-09-23T10:09:35Z |
| format | Article |
| id | mit-1721.1/95797 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:09:35Z |
| publishDate | 2015 |
| publisher | Elsevier B.V. |
| record_format | dspace |
| spelling | mit-1721.1/957972023-02-26T10:44:31Z Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at √s = 8 TeV CMS Collaboration Apyan, Aram Barbieri, Richard Alexander Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David 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, M. 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, 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 Zhukova, Victoria A search for pair production of third-generation scalar leptoquarks and supersymmetric top quark partners, top squarks, in final states involving tau leptons and bottom quarks is presented. The search uses events from a data sample of proton–proton collisions corresponding to an integrated luminosity of 19.7 fb−1, collected with the CMS detector at the LHC with View the MathML sources=8 TeV. The number of observed events is found to be in agreement with the expected standard model background. Third-generation scalar leptoquarks with masses below 740 GeV are excluded at 95% confidence level, assuming a 100% branching fraction for the leptoquark decay to a tau lepton and a bottom quark. In addition, this mass limit applies directly to top squarks decaying via an R-parity violating coupling View the MathML sourceλ333′. The search also considers a similar signature from top squarks undergoing a chargino-mediated decay involving the R-parity violating coupling View the MathML sourceλ3jk′. Each top squark decays to a tau lepton, a bottom quark, and two light quarks. Top squarks in this model with masses below 580 GeV are excluded at 95% confidence level. The constraint on the leptoquark mass is the most stringent to date, and this is the first search for top squarks decaying via sourceλ3jk′ United States. Dept. of Energy National Science Foundation (U.S.) 2015-03-04T16:38:54Z 2015-03-04T16:38:54Z 2014-12 2014-10 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/95797 Apyan, A, R. Barbieri, G. Bauer, W. Busza, I.A. Cali, M. Chan, L. Di Matteo, V. Dutta et al. “Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at √s = 8 TeV.” Physics Letters B 739 (December 2014): 229–249. 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/0000-0002-7945-005X https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0003-2593-7767 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.2014.10.063 Physics Letters B Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier B.V. Elsevier |
| spellingShingle | CMS Collaboration Apyan, Aram Barbieri, Richard Alexander Busza, Wit Cali, Ivan Amos Chan, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Ma, Teng Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at √s = 8 TeV |
| title | Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at √s = 8 TeV |
| title_full | Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at √s = 8 TeV |
| title_fullStr | Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at √s = 8 TeV |
| title_full_unstemmed | Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at √s = 8 TeV |
| title_short | Search for pair production of third-generation scalar leptoquarks and top squarks in proton–proton collisions at √s = 8 TeV |
| title_sort | search for pair production of third generation scalar leptoquarks and top squarks in proton proton collisions at √s 8 tev |
| url | http://hdl.handle.net/1721.1/95797 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/0000-0002-7945-005X https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0003-2593-7767 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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