Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV
A search is presented for decays of Z and Higgs bosons to a J/ψ meson and a photon, with the subsequent decay of the J/ψ to μ⁺μ⁻. The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9fb⁻¹ at √s = 13 TeV collected with the CMS detector at the LHC. The observed lim...
| _version_ | 1826217601968111616 |
|---|---|
| author | CMS Collaboration Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Baty, Austin Alan Bauer, Gerry P Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Harris, Philip Coleman Hsu, Dylan George Hu, Miao Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lee, Yen-Jie 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 Stephans, George S. F. Sumorok, Konstanty C Tatar, Kaya Velicanu, Dragos Alexandru Wang, Jing Wang, Ta-Wei Wyslouch, Boleslaw Shi, Zhaozhong |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering CMS Collaboration Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Baty, Austin Alan Bauer, Gerry P Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Harris, Philip Coleman Hsu, Dylan George Hu, Miao Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lee, Yen-Jie 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 Stephans, George S. F. Sumorok, Konstanty C Tatar, Kaya Velicanu, Dragos Alexandru Wang, Jing Wang, Ta-Wei Wyslouch, Boleslaw Shi, Zhaozhong |
| author_sort | CMS Collaboration |
| collection | MIT |
| description | A search is presented for decays of Z and Higgs bosons to a J/ψ meson and a photon, with the subsequent decay of the J/ψ to μ⁺μ⁻. The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9fb⁻¹ at √s = 13 TeV collected with the CMS detector at the LHC. The observed limit on the Z → J/ψγ decay branching fraction, assuming that the J/ψ meson is produced unpolarized, is 1.4×10⁻⁶ at 95% confidence level, which corresponds to a rate higher than expected in the standard model by a factor of 15. For extreme-polarization scenarios, the observed limit changes from −13.6 to +8.6% with respect to the unpolarized scenario. The observed upper limit on the branching fraction for H → J/ψγ where the J/ψ meson is assumed to be transversely polarized is 7.6×10⁻⁴, a factor of 260 larger than the standard model prediction. The results for the Higgs boson are combined with previous data from proton-proton collisions at √s = 8 TeV to produce an observed upper limit on the branching fraction for H → J/ψγ that is a factor of 220 larger than the standard model value. |
| first_indexed | 2024-09-23T17:06:17Z |
| format | Article |
| id | mit-1721.1/120456 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T17:06:17Z |
| publishDate | 2019 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/1204562022-10-03T10:28:08Z Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV CMS Collaboration Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Baty, Austin Alan Bauer, Gerry P Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Harris, Philip Coleman Hsu, Dylan George Hu, Miao Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lee, Yen-Jie 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 Stephans, George S. F. Sumorok, Konstanty C Tatar, Kaya Velicanu, Dragos Alexandru Wang, Jing Wang, Ta-Wei Wyslouch, Boleslaw Shi, Zhaozhong Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Baty, Austin Alan Bauer, Gerry P Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Harris, Philip Coleman Hsu, Dylan George Hu, Miao Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lee, Yen-Jie 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 Stephans, George S. F. Sumorok, Konstanty C Tatar, Kaya Velicanu, Dragos Alexandru Wang, Jing Wang, Ta-Wei Wyslouch, Boleslaw Shi, Zhaozhong A search is presented for decays of Z and Higgs bosons to a J/ψ meson and a photon, with the subsequent decay of the J/ψ to μ⁺μ⁻. The analysis uses data from proton-proton collisions with an integrated luminosity of 35.9fb⁻¹ at √s = 13 TeV collected with the CMS detector at the LHC. The observed limit on the Z → J/ψγ decay branching fraction, assuming that the J/ψ meson is produced unpolarized, is 1.4×10⁻⁶ at 95% confidence level, which corresponds to a rate higher than expected in the standard model by a factor of 15. For extreme-polarization scenarios, the observed limit changes from −13.6 to +8.6% with respect to the unpolarized scenario. The observed upper limit on the branching fraction for H → J/ψγ where the J/ψ meson is assumed to be transversely polarized is 7.6×10⁻⁴, a factor of 260 larger than the standard model prediction. The results for the Higgs boson are combined with previous data from proton-proton collisions at √s = 8 TeV to produce an observed upper limit on the branching fraction for H → J/ψγ that is a factor of 220 larger than the standard model value. 2019-02-14T18:36:19Z 2019-02-14T18:36:19Z 2019-01 2018-10 Article http://purl.org/eprint/type/JournalArticle 1434-6044 1434-6052 http://hdl.handle.net/1721.1/120456 Sirunyan, A. M. et al. “Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV.” The European Physical Journal C 79, 2 (January 2019): 94 © 2019 CERN for the benefit of the CMS collaboration https://orcid.org/0000-0003-0293-1944 https://orcid.org/0000-0002-4371-2038 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/0000-0002-2822-3375 https://orcid.org/0000-0002-7409-7904 https://orcid.org/0000-0001-8521-737X https://orcid.org/0000-0001-8189-3741 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/0000-0002-6923-293X https://orcid.org/0000-0003-2593-7767 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/0000-0002-7312-5854 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-6448-0168 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0001-5259-1883 https://orcid.org/0000-0002-0899-7621 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0001-5498-8825 en_US https://doi.org/10.1140/epjc/s10052-019-6562-5 European Physical Journal C: Particles and Fields Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag Springer |
| spellingShingle | CMS Collaboration Abercrombie, Daniel Robert Allen, Brandon Leigh Azzolini, Virginia Baty, Austin Alan Bauer, Gerry P Bi, Ran Brandt, Stephanie Akemi Busza, Wit Cali, Ivan Amos D'Alfonso, Mariarosaria Demiragli, Zeynep Gomez-Ceballos, Guillelmo Goncharov, Maxim Harris, Philip Coleman Hsu, Dylan George Hu, Miao Iiyama, Yutaro Innocenti, Gian Michele Klute, Markus Kovalskyi, Dmytro Lee, Yen-Jie 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 Stephans, George S. F. Sumorok, Konstanty C Tatar, Kaya Velicanu, Dragos Alexandru Wang, Jing Wang, Ta-Wei Wyslouch, Boleslaw Shi, Zhaozhong Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV |
| title | Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV |
| title_full | Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV |
| title_fullStr | Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV |
| title_full_unstemmed | Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV |
| title_short | Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV |
| title_sort | search for rare decays of z and higgs bosons to j ψ and a photon in proton proton collisions at √s 13 tev |
| url | http://hdl.handle.net/1721.1/120456 https://orcid.org/0000-0003-0293-1944 https://orcid.org/0000-0002-4371-2038 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/0000-0002-2822-3375 https://orcid.org/0000-0002-7409-7904 https://orcid.org/0000-0001-8521-737X https://orcid.org/0000-0001-8189-3741 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/0000-0002-6923-293X https://orcid.org/0000-0003-2593-7767 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/0000-0002-7312-5854 https://orcid.org/0000-0001-8983-2169 https://orcid.org/0000-0003-3106-4894 https://orcid.org/0000-0002-6448-0168 https://orcid.org/0000-0002-1260-777X https://orcid.org/0000-0001-5259-1883 https://orcid.org/0000-0002-0899-7621 https://orcid.org/0000-0003-3681-0649 https://orcid.org/0000-0001-5498-8825 |
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