Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at √s = 13 TeV
A search for a signal consistent with the type-III seesaw mechanism in events with three or more electrons or muons is presented. The data sample consists of proton-proton collisions at √s=13 TeV collected by the CMS experiment at the LHC in 2016 and corresponds to an integrated luminosity of 35.9 ...
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| author | CMS Collaboration Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Barbieri, Richard Alexander Baty, Austin Alan Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Hsu, Dylan George Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lai, Yue Shi Lee, Young-Jin Levin, Amy Elizabeth Luckey Jr, P David Maier, Benedikt Marini, Andrea Carlo McGinn, Christopher Francis Mironov, Camelia Maria Narayanan, Siddharth Madhavan Niu, Xinmei Paus, Christoph M. E. Roland, Christof E Roland, Gunther M Salfeld-Nebgen, Jakob Maxillian Henry Stephans, George S. F. Tatar, Kaya Velicanu, Dragos Alexandru Wang, J. Wang, Ta-Wei Wyslouch, Boleslaw |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics CMS Collaboration Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Barbieri, Richard Alexander Baty, Austin Alan Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Hsu, Dylan George Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lai, Yue Shi Lee, Young-Jin Levin, Amy Elizabeth Luckey Jr, P David Maier, Benedikt Marini, Andrea Carlo McGinn, Christopher Francis Mironov, Camelia Maria Narayanan, Siddharth Madhavan Niu, Xinmei Paus, Christoph M. E. Roland, Christof E Roland, Gunther M Salfeld-Nebgen, Jakob Maxillian Henry Stephans, George S. F. Tatar, Kaya Velicanu, Dragos Alexandru Wang, J. Wang, Ta-Wei Wyslouch, Boleslaw |
| author_sort | CMS Collaboration |
| collection | MIT |
| description | A search for a signal consistent with the type-III seesaw mechanism in events with three or more electrons or muons is presented. The data sample consists of proton-proton collisions at √s=13 TeV collected by the CMS experiment at the LHC in 2016 and corresponds to an integrated luminosity of 35.9 fb[superscript −1]. Selection criteria based on the number of leptons and the invariant mass of oppositely charged lepton pairs are used to distinguish the signal from the standard model background. The observations are consistent with the expectations from standard model processes. The results are used to place limits on the production of heavy fermions of the type-III seesaw model as a function of the branching ratio to each lepton flavor. In the scenario of equal branching fractions to each lepton flavor, heavy fermions with masses below 840 GeV are excluded. This is the most sensitive probe to date of the type-III seesaw mechanism. |
| first_indexed | 2024-09-23T11:35:59Z |
| format | Article |
| id | mit-1721.1/114598 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:35:59Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1145982022-10-01T04:43:04Z Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at √s = 13 TeV CMS Collaboration Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Barbieri, Richard Alexander Baty, Austin Alan Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Hsu, Dylan George Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lai, Yue Shi Lee, Young-Jin Levin, Amy Elizabeth Luckey Jr, P David Maier, Benedikt Marini, Andrea Carlo McGinn, Christopher Francis Mironov, Camelia Maria Narayanan, Siddharth Madhavan Niu, Xinmei Paus, Christoph M. E. Roland, Christof E Roland, Gunther M Salfeld-Nebgen, Jakob Maxillian Henry Stephans, George S. F. Tatar, Kaya Velicanu, Dragos Alexandru Wang, J. Wang, Ta-Wei Wyslouch, Boleslaw Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Barbieri, Richard Alexander Baty, Austin Alan Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Hsu, Dylan George Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lai, Yue Shi Lee, Young-Jin Levin, Amy Elizabeth Luckey Jr, P David Maier, Benedikt Marini, Andrea Carlo McGinn, Christopher Francis Mironov, Camelia Maria Narayanan, Siddharth Madhavan Niu, Xinmei Paus, Christoph M. E. Roland, Christof E Roland, Gunther M Salfeld-Nebgen, Jakob Maxillian Henry Stephans, George S. F. Tatar, Kaya Velicanu, Dragos Alexandru Wang, J. Wang, Ta-Wei Wyslouch, Boleslaw A search for a signal consistent with the type-III seesaw mechanism in events with three or more electrons or muons is presented. The data sample consists of proton-proton collisions at √s=13 TeV collected by the CMS experiment at the LHC in 2016 and corresponds to an integrated luminosity of 35.9 fb[superscript −1]. Selection criteria based on the number of leptons and the invariant mass of oppositely charged lepton pairs are used to distinguish the signal from the standard model background. The observations are consistent with the expectations from standard model processes. The results are used to place limits on the production of heavy fermions of the type-III seesaw model as a function of the branching ratio to each lepton flavor. In the scenario of equal branching fractions to each lepton flavor, heavy fermions with masses below 840 GeV are excluded. This is the most sensitive probe to date of the type-III seesaw mechanism. 2018-04-06T17:29:27Z 2018-04-06T17:29:27Z 2017-12 2017-08 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/114598 Sirunyan, A. M. et al. “Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at √s = 13 TeV.” Physical Review Letters 119, 22 (December 2017): 221802 © 2017 CERN, for the CMS Collaboration https://orcid.org/0000-0003-0293-1944 https://orcid.org/0000-0002-4371-2038 https://orcid.org/0000-0002-7945-005X https://orcid.org/0000-0001-5310-3466 https://orcid.org/0000-0003-3951-4634 https://orcid.org/0000-0002-8590-2673 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0002-7409-7904 https://orcid.org/0000-0001-8521-737X https://orcid.org/0000-0002-8696-1747 https://orcid.org/0000-0002-8297-5930 https://orcid.org/0000-0003-4511-0855 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0003-2351-0487 https://orcid.org/0000-0003-1281-0193 https://orcid.org/0000-0002-8599-2437 https://orcid.org/0000-0003-2723-3560 https://orcid.org/0000-0001-7842-1591 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0003-3879-5622 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-6448-0168 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-0899-7621 https://orcid.org/0000-0003-3681-0649 en_US http://dx.doi.org/10.1103/PhysRevLett.119.221802 Physical Review Letters Creative Commons Attribution 3.0 Unported license http://creativecommons.org/licenses/by/3.0/ application/pdf American Physical Society APS |
| spellingShingle | CMS Collaboration Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Barbieri, Richard Alexander Baty, Austin Alan Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Hsu, Dylan George Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lai, Yue Shi Lee, Young-Jin Levin, Amy Elizabeth Luckey Jr, P David Maier, Benedikt Marini, Andrea Carlo McGinn, Christopher Francis Mironov, Camelia Maria Narayanan, Siddharth Madhavan Niu, Xinmei Paus, Christoph M. E. Roland, Christof E Roland, Gunther M Salfeld-Nebgen, Jakob Maxillian Henry Stephans, George S. F. Tatar, Kaya Velicanu, Dragos Alexandru Wang, J. Wang, Ta-Wei Wyslouch, Boleslaw Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at √s = 13 TeV |
| title | Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at √s = 13 TeV |
| title_full | Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at √s = 13 TeV |
| title_fullStr | Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at √s = 13 TeV |
| title_full_unstemmed | Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at √s = 13 TeV |
| title_short | Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at √s = 13 TeV |
| title_sort | search for evidence of the type iii seesaw mechanism in multilepton final states in proton proton collisions at √s 13 tev |
| url | http://hdl.handle.net/1721.1/114598 https://orcid.org/0000-0003-0293-1944 https://orcid.org/0000-0002-4371-2038 https://orcid.org/0000-0002-7945-005X https://orcid.org/0000-0001-5310-3466 https://orcid.org/0000-0003-3951-4634 https://orcid.org/0000-0002-8590-2673 https://orcid.org/0000-0002-3831-9071 https://orcid.org/0000-0002-7409-7904 https://orcid.org/0000-0001-8521-737X https://orcid.org/0000-0002-8696-1747 https://orcid.org/0000-0002-8297-5930 https://orcid.org/0000-0003-4511-0855 https://orcid.org/0000-0002-0869-5631 https://orcid.org/0000-0003-1486-606X https://orcid.org/0000-0003-2351-0487 https://orcid.org/0000-0003-1281-0193 https://orcid.org/0000-0002-8599-2437 https://orcid.org/0000-0003-2723-3560 https://orcid.org/0000-0001-7842-1591 https://orcid.org/0000-0002-6047-4211 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0003-3879-5622 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-6448-0168 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0002-0899-7621 https://orcid.org/0000-0003-3681-0649 |
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