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Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV

التفاصيل البيبلوغرافية
العنوان: Search for Rare Decays of Z and Higgs Bosons to J/ψ and a Photon in Proton-Proton Collisions at √s = 13 TeV
المؤلفون: 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
المساهمون: 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
المصدر: Springer
بيانات النشر: Springer-Verlag
سنة النشر: 2018
المجموعة: DSpace@MIT (Massachusetts Institute of Technology)
الوصف: 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.
نوع الوثيقة: article in journal/newspaper
وصف الملف: application/pdf
اللغة: English
تدمد: 1434-6044
1434-6052
Relation: https://doi.org/10.1140/epjc/s10052-019-6562-5; European Physical Journal C: Particles and Fields; 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; orcid:0000-0003-0293-1944; orcid:0000-0002-4371-2038; orcid:0000-0001-5310-3466; orcid:0000-0003-3951-4634; orcid:0000-0002-8590-2673; orcid:0000-0002-3831-9071; orcid:0000-0002-2822-3375; orcid:0000-0002-7409-7904; orcid:0000-0001-8521-737X; orcid:0000-0001-8189-3741; orcid:0000-0002-8696-1747; orcid:0000-0002-8297-5930; orcid:0000-0003-4511-0855; orcid:0000-0002-0869-5631; orcid:0000-0002-6923-293X; orcid:0000-0003-2593-7767; orcid:0000-0003-2351-0487; orcid:0000-0003-1281-0193; orcid:0000-0002-8599-2437; orcid:0000-0003-2723-3560; orcid:0000-0001-7842-1591; orcid:0000-0002-6047-4211; orcid:0000-0002-7312-5854; orcid:0000-0001-8983-2169; orcid:0000-0003-3106-4894; orcid:0000-0002-6448-0168; orcid:0000-0002-1260-777X; orcid:0000-0001-5259-1883; orcid:0000-0002-0899-7621; orcid:0000-0003-3681-0649; orcid:0000-0001-5498-8825
الاتاحة: http://hdl.handle.net/1721.1/120456
Rights: Creative Commons Attribution 4.0 International license ; https://creativecommons.org/licenses/by/4.0/
رقم الانضمام: edsbas.9B373743
قاعدة البيانات: BASE
الوصف
تدمد:14346044
14346052