A search for excited leptons in pp collisions at √s = 7 TeV
A search for excited leptons is carried out with the CMS detector at the LHC, using 36 pb[superscript −1] of pp collision data recorded at √s = 7 TeV. The search is performed for associated production of a lepton and an oppositely charged excited lepton pp→ℓℓ*, followed by the decay ℓ*→ℓγ, resulting...
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| Format: | Article |
| Language: | en_US |
| Published: |
Elsevier
2014
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| Online Access: | http://hdl.handle.net/1721.1/92458 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/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-0869-5631 |
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| author | Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Everaerts, Pieter Bruno Bart Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Kim, Y. Klute, Markus Li, W. Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Rudolph, Matthew Scott Stephans, George S. F. Sung, Kevin Kai Hong Wenger, Edward Allen Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Wyslouch, Boleslaw Luckey Jr, P David Roland, Gunther M Sumorok, Konstanty C Xie, Si Alver, Burak Han Harris, Philip Coleman Lee, Yen-Jie Loizides, Constantinos Roland, Christof E Stoeckli, Fabian Wolf, Roger Yang, Mingming Bauer, Gerry P Dutta, Valentina |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Everaerts, Pieter Bruno Bart Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Kim, Y. Klute, Markus Li, W. Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Rudolph, Matthew Scott Stephans, George S. F. Sung, Kevin Kai Hong Wenger, Edward Allen Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Wyslouch, Boleslaw Luckey Jr, P David Roland, Gunther M Sumorok, Konstanty C Xie, Si Alver, Burak Han Harris, Philip Coleman Lee, Yen-Jie Loizides, Constantinos Roland, Christof E Stoeckli, Fabian Wolf, Roger Yang, Mingming Bauer, Gerry P Dutta, Valentina |
| author_sort | Bendavid, Joshua L. |
| collection | MIT |
| description | A search for excited leptons is carried out with the CMS detector at the LHC, using 36 pb[superscript −1] of pp collision data recorded at √s = 7 TeV. The search is performed for associated production of a lepton and an oppositely charged excited lepton pp→ℓℓ*, followed by the decay ℓ*→ℓγ, resulting in the ℓℓγ final state, where ℓ=e, μ. No excess of events above the standard model expectation is observed. Interpreting the findings in the context of ℓ* production through four-fermion contact interactions and subsequent decay via electroweak processes, first upper limits are reported for ℓ* production at this collision energy. The exclusion region in the compositeness scale Λ and excited lepton mass M[subscript ℓ*] parameter space is extended beyond previously established limits. For Λ=M[subscript ℓ*], excited lepton masses are excluded below 1070 [GeV over c[superscript 2]] for e* and 1090 [GeV over c[superscript 2]] for μ* at the 95% confidence level. |
| first_indexed | 2024-09-23T12:08:17Z |
| format | Article |
| id | mit-1721.1/92458 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:08:17Z |
| publishDate | 2014 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/924582023-02-26T04:12:58Z A search for excited leptons in pp collisions at √s = 7 TeV Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Everaerts, Pieter Bruno Bart Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Kim, Y. Klute, Markus Li, W. Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Rudolph, Matthew Scott Stephans, George S. F. Sung, Kevin Kai Hong Wenger, Edward Allen Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Wyslouch, Boleslaw Luckey Jr, P David Roland, Gunther M Sumorok, Konstanty C Xie, Si Alver, Burak Han Harris, Philip Coleman Lee, Yen-Jie Loizides, Constantinos Roland, Christof E Stoeckli, Fabian Wolf, Roger Yang, Mingming Bauer, Gerry P Dutta, Valentina Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Massachusetts Institute of Technology. School of Science Alver, B. Bauer, Gerry P. Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Dutta, V. Everaerts, Pieter Bruno Bart Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Harris, P. Kim, Y. Klute, Markus Lee, Y.-J. Li, W. Loizides, C. Luckey, P. David, Jr. Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Roland, Christof E. Roland, Gunther M. Rudolph, Matthew Scott Stephans, George S. F. Stockli, Fabian Sumorok, Konstanty C. Sung, Kevin Kai Hong Wenger, Edward Allen Wolf, R. Xie, S. Yang, M. Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Wyslouch, Boleslaw A search for excited leptons is carried out with the CMS detector at the LHC, using 36 pb[superscript −1] of pp collision data recorded at √s = 7 TeV. The search is performed for associated production of a lepton and an oppositely charged excited lepton pp→ℓℓ*, followed by the decay ℓ*→ℓγ, resulting in the ℓℓγ final state, where ℓ=e, μ. No excess of events above the standard model expectation is observed. Interpreting the findings in the context of ℓ* production through four-fermion contact interactions and subsequent decay via electroweak processes, first upper limits are reported for ℓ* production at this collision energy. The exclusion region in the compositeness scale Λ and excited lepton mass M[subscript ℓ*] parameter space is extended beyond previously established limits. For Λ=M[subscript ℓ*], excited lepton masses are excluded below 1070 [GeV over c[superscript 2]] for e* and 1090 [GeV over c[superscript 2]] for μ* at the 95% confidence level. United States. Dept. of Energy National Science Foundation (U.S.) 2014-12-23T16:08:25Z 2014-12-23T16:08:25Z 2011-09 2011-08 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/92458 Chatrchyan, S., V. Khachatryan, A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “A Search for Excited Leptons in Pp Collisions at √s = 7 TeV.” Physics Letters B 704, no. 3 (October 2011): 143–162. © 2011 CERN 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/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-0869-5631 en_US http://dx.doi.org/10.1016/j.physletb.2011.09.021 Physics Letters B Creative Commons Attribution http://creativecommons.org/licenses/by/3.0/ application/pdf Elsevier Elsevier |
| spellingShingle | Bendavid, Joshua L. Busza, Wit Butz, Erik M. Cali, Ivan Amos Chan, M. Everaerts, Pieter Bruno Bart Gomez-Ceballos, Guillelmo Goncharov, Maxim Hahn, Kristian Allan Kim, Y. Klute, Markus Li, W. Ma, Teng Nahn, Steven Paus, Christoph M. E. Ralph, Duncan Kelley Rudolph, Matthew Scott Stephans, George S. F. Sung, Kevin Kai Hong Wenger, Edward Allen Yilmaz, Yetkin Yoon, A. S. Zanetti, Marco Wyslouch, Boleslaw Luckey Jr, P David Roland, Gunther M Sumorok, Konstanty C Xie, Si Alver, Burak Han Harris, Philip Coleman Lee, Yen-Jie Loizides, Constantinos Roland, Christof E Stoeckli, Fabian Wolf, Roger Yang, Mingming Bauer, Gerry P Dutta, Valentina A search for excited leptons in pp collisions at √s = 7 TeV |
| title | A search for excited leptons in pp collisions at √s = 7 TeV |
| title_full | A search for excited leptons in pp collisions at √s = 7 TeV |
| title_fullStr | A search for excited leptons in pp collisions at √s = 7 TeV |
| title_full_unstemmed | A search for excited leptons in pp collisions at √s = 7 TeV |
| title_short | A search for excited leptons in pp collisions at √s = 7 TeV |
| title_sort | search for excited leptons in pp collisions at √s 7 tev |
| url | http://hdl.handle.net/1721.1/92458 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/0000-0002-6047-4211 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0003-2593-7767 https://orcid.org/0000-0002-0869-5631 |
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