Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s = 8 TeV
A search for supersymmetry through the direct pair production of top squarks, with Higgs (H) or Z bosons in the decay chain, is performed using a data sample of proton–proton collisions at √s=8 TeV collected in 2012 with the CMS detector at the LHC. The sample corresponds to an integrated luminosity...
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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/1721.1/91178 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 |
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| author | 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 Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Zanetti, Marco ATLAS Collaboration Sumorok, Konstanty C Yang, Mingming Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David Ma, Teng Roland, Christof E Roland, Gunther M |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics 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 Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Zanetti, Marco ATLAS Collaboration Sumorok, Konstanty C Yang, Mingming Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David Ma, Teng Roland, Christof E Roland, Gunther M |
| author_sort | Apyan, Aram |
| collection | MIT |
| description | A search for supersymmetry through the direct pair production of top squarks, with Higgs (H) or Z bosons in the decay chain, is performed using a data sample of proton–proton collisions at √s=8 TeV collected in 2012 with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 19.5 fb[superscript −1]. The search is performed using a selection of events containing leptons and bottom-quark jets. No evidence for a significant excess of events over the standard model background prediction is observed. The results are interpreted in the context of simplified supersymmetric models with pair production of a heavier top-squark mass eigenstate t˜2 decaying to a lighter top-squark mass eigenstate t˜1 via either ˜2→Ht˜1 or t˜2→Zt˜1, followed in both cases by t˜1→tχ˜10, where χ˜10 is an undetected, stable, lightest supersymmetric particle. The interpretation is performed in the region where the mass difference between thet˜1 and χ˜10 states is approximately equal to the top-quark mass (m[subscript t˜1]−mχ˜10≃mt), which is not probed by searches for direct t˜1 squark pair production. The analysis excludes top squarks with masses m[subscript t˜2]<575 GeV and m[subscript t˜1]<400 GeV at a 95% confidence level. |
| first_indexed | 2024-09-23T13:23:44Z |
| format | Article |
| id | mit-1721.1/91178 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:23:44Z |
| publishDate | 2014 |
| publisher | Elsevier B.V. |
| record_format | dspace |
| spelling | mit-1721.1/911782023-02-26T05:44:29Z Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s = 8 TeV 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 Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Zanetti, Marco ATLAS Collaboration Sumorok, Konstanty C Yang, Mingming Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David Ma, Teng Roland, Christof E Roland, Gunther 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, M. Di Matteo, Leonardo Dutta, Valentina Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Luckey, P. David Ma, T. 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, M. Zanetti, Marco Zhukova, Victoria A search for supersymmetry through the direct pair production of top squarks, with Higgs (H) or Z bosons in the decay chain, is performed using a data sample of proton–proton collisions at √s=8 TeV collected in 2012 with the CMS detector at the LHC. The sample corresponds to an integrated luminosity of 19.5 fb[superscript −1]. The search is performed using a selection of events containing leptons and bottom-quark jets. No evidence for a significant excess of events over the standard model background prediction is observed. The results are interpreted in the context of simplified supersymmetric models with pair production of a heavier top-squark mass eigenstate t˜2 decaying to a lighter top-squark mass eigenstate t˜1 via either ˜2→Ht˜1 or t˜2→Zt˜1, followed in both cases by t˜1→tχ˜10, where χ˜10 is an undetected, stable, lightest supersymmetric particle. The interpretation is performed in the region where the mass difference between thet˜1 and χ˜10 states is approximately equal to the top-quark mass (m[subscript t˜1]−mχ˜10≃mt), which is not probed by searches for direct t˜1 squark pair production. The analysis excludes top squarks with masses m[subscript t˜2]<575 GeV and m[subscript t˜1]<400 GeV at a 95% confidence level. National Science Foundation (U.S.) United States. Dept. of Energy 2014-10-27T15:01:23Z 2014-10-27T15:01:23Z 2014-09 2014-07 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/91178 “Search for Top-Squark Pairs Decaying into Higgs or Z Bosons in Pp Collisions at √s = 8 TeV.” Physics Letters B 736 (September 2014): 371–397. 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 en_US http://dx.doi.org/10.1016/j.physletb.2014.07.053 Physics Letters B Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier B.V. Elsevier |
| spellingShingle | 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 Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Stoeckli, Fabian Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Zanetti, Marco ATLAS Collaboration Sumorok, Konstanty C Yang, Mingming Wyslouch, Victoria Bauer, Gerry P Luckey Jr, P David Ma, Teng Roland, Christof E Roland, Gunther M Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s = 8 TeV |
| title | Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s = 8 TeV |
| title_full | Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s = 8 TeV |
| title_fullStr | Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s = 8 TeV |
| title_full_unstemmed | Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s = 8 TeV |
| title_short | Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at √s = 8 TeV |
| title_sort | search for top squark pairs decaying into higgs or z bosons in pp collisions at √s 8 tev |
| url | http://hdl.handle.net/1721.1/91178 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 |
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