Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method
A search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks is presented. Events with hadronic jets and one or two oppositely charged leptons are selected from a data sample corresponding to an integrated luminosity of 19.5 fb[superscript -1]...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag
2015
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| Online Access: | http://hdl.handle.net/1721.1/98259 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-8590-2673 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0002-7945-005X https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0001-5310-3466 https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0002-2622-8295 https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0002-1136-6900 |
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| author | Apyan, Aram Barbieri, Richard Alexander Baty, Austin Alan Bierwagen, Katharina Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos Di Matteo, Leonardo Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wyslouch, Victoria |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Apyan, Aram Barbieri, Richard Alexander Baty, Austin Alan Bierwagen, Katharina Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos Di Matteo, Leonardo Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wyslouch, Victoria |
| author_sort | Apyan, Aram |
| collection | MIT |
| description | A search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks is presented. Events with hadronic jets and one or two oppositely charged leptons are selected from a data sample corresponding to an integrated luminosity of 19.5 fb[superscript -1] collected by the CMS experiment at the LHC in pp collisions at a centre-of-mass energy of 8 TeV. In order to separate the signal from the larger t[bar over t] + jets background, this analysis uses a matrix element method that assigns a probability density value to each reconstructed event under signal or background hypotheses. The ratio between the two values is used in a maximum likelihood fit to extract the signal yield. The results are presented in terms of the measured signal strength modifier, μ, relative to the standard model prediction for a Higgs boson mass of 125 GeV. The observed (expected) exclusion limit at a 95 % confidence level is μ < 4.2 (3.3), corresponding to a best fit value [^ over μ] = 1.2[+1.6 over −1.5]. |
| first_indexed | 2024-09-23T16:27:13Z |
| format | Article |
| id | mit-1721.1/98259 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:27:13Z |
| publishDate | 2015 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/982592023-02-26T04:14:00Z Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method Apyan, Aram Barbieri, Richard Alexander Baty, Austin Alan Bierwagen, Katharina Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos Di Matteo, Leonardo Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wyslouch, Victoria Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Massachusetts Institute of Technology. School of Science Apyan, Aram Barbieri, Richard Alexander Baty, Austin Alan Bierwagen, Katharina Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos Di Matteo, Leonardo Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Luckey, P. David, Jr. Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E. Roland, Gunther M. Stephans, George S. F. Sumorok, Konstanty C. Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Zhukova, Victoria A search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks is presented. Events with hadronic jets and one or two oppositely charged leptons are selected from a data sample corresponding to an integrated luminosity of 19.5 fb[superscript -1] collected by the CMS experiment at the LHC in pp collisions at a centre-of-mass energy of 8 TeV. In order to separate the signal from the larger t[bar over t] + jets background, this analysis uses a matrix element method that assigns a probability density value to each reconstructed event under signal or background hypotheses. The ratio between the two values is used in a maximum likelihood fit to extract the signal yield. The results are presented in terms of the measured signal strength modifier, μ, relative to the standard model prediction for a Higgs boson mass of 125 GeV. The observed (expected) exclusion limit at a 95 % confidence level is μ < 4.2 (3.3), corresponding to a best fit value [^ over μ] = 1.2[+1.6 over −1.5]. United States. Dept. of Energy National Science Foundation (U.S.) Alfred P. Sloan Foundation 2015-08-26T18:07:20Z 2015-08-26T18:07:20Z 2015-06 2015-02 Article http://purl.org/eprint/type/JournalArticle 1434-6044 1434-6052 http://hdl.handle.net/1721.1/98259 Khachatryan, V., A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, et al. “Search for a Standard Model Higgs Boson Produced in Association with a Top-Quark Pair and Decaying to Bottom Quarks Using a Matrix Element Method.” The European Physical Journal C 75, no. 6 (June 2015). © 2015 CERN for the benefit of the CMS collaboration https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-8590-2673 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0002-7945-005X https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0001-5310-3466 https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0002-2622-8295 https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0002-1136-6900 en_US http://dx.doi.org/10.1140/epjc/s10052-015-3454-1 The European Physical Journal C Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag Springer-Verlag |
| spellingShingle | Apyan, Aram Barbieri, Richard Alexander Baty, Austin Alan Bierwagen, Katharina Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos Di Matteo, Leonardo Gomez-Ceballos, Guillelmo Goncharov, Maxim Gulhan, Doga Can Klute, Markus Lai, Yue Shi Lee, Yen-Jie Levin, Andrew Michael Paus, Christoph M. E. Ralph, Duncan Kelley Stephans, George S. F. Velicanu, Dragos Alexandru Veverka, Jan Wyslouch, Boleslaw Yang, Mingming Zanetti, Marco Luckey Jr, P David Roland, Christof E Roland, Gunther M Sumorok, Konstanty C Wyslouch, Victoria Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method |
| title | Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method |
| title_full | Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method |
| title_fullStr | Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method |
| title_full_unstemmed | Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method |
| title_short | Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method |
| title_sort | search for a standard model higgs boson produced in association with a top quark pair and decaying to bottom quarks using a matrix element method |
| url | http://hdl.handle.net/1721.1/98259 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-8590-2673 https://orcid.org/0000-0001-6332-5839 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0002-7945-005X https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0001-5310-3466 https://orcid.org/0000-0002-9418-6656 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0002-2622-8295 https://orcid.org/0000-0001-9236-6621 https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0002-1136-6900 |
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