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https://elib.bsu.by/handle/123456789/265043
Заглавие документа: | Search for a standard model-like Higgs boson in the μ+μ− and e+e− decay channels at the LHC |
Авторы: | Mossolov, V. Shumeiko, N. Gonzalez, Suarez J. CMS Collaboration |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
Дата публикации: | 2015 |
Издатель: | Elsevier B.V. |
Библиографическое описание источника: | Phys Lett Sect B Nucl Elem Part High-Energy Phys 2015;744:184-207. |
Аннотация: | A search is presented for a standard model-like Higgs boson decaying to the μ+μ− or e+e− final states based on proton–proton collisions recorded by the CMS experiment at the CERN LHC. The data correspond to integrated luminosities of 5.0 fb−1 at a centre-of-mass energy of 7 TeV and 19.7 fb−1 at 8 TeV for the μ+μ− search, and of 19.7 fb−1 at 8 TeV for the e+e− search. Upper limits on the production cross section times branching fraction at the 95% confidence level are reported for Higgs boson masses in the range from 120 to 150 GeV. For a Higgs boson with a mass of 125 GeV decaying to μ+μ−, the observed (expected) upper limit on the production rate is found to be 7.4 (6.5−1.9 +2.8) times the standard model value. This corresponds to an upper limit on the branching fraction of 0.0016. Similarly, for e+e−, an upper limit of 0.0019 is placed on the branching fraction, which is ≈3.7×105 times the standard model value. These results, together with recent evidence of the 125 GeV boson coupling to τ-leptons with a larger branching fraction consistent with the standard model, confirm that the leptonic couplings of the new boson are not flavour-universal. |
URI документа: | https://elib.bsu.by/handle/123456789/265043 |
DOI документа: | 10.1016/j.physletb.2015.03.048 |
Scopus идентификатор документа: | 85041770332 |
Финансовая поддержка: | Marie-Curie programme and the European Research Council and EPLANET (European Union); the Leventis Foundation ; the A.P. Sloan Foundation ; the Alexander von Humboldt Foundation ; the Belgian Federal Science Policy Office ; the Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Council of Science and Industrial Research , India; the HOMING PLUS programme of Foundation for Polish Science , cofinanced from European Union, Regional Development Fund ; the Compagnia di San Paolo (Torino); the Consorzio per la Fisica (Trieste); MIUR project 20108T4XTM (Italy); the Thalis and Aristeia programmes cofinanced by EU-ESF and the Greek NSRF ; and the National Priorities Research Program by Qatar National Research Fund ; and the Russian Scientific Fund , grant N 14-12-00110. |
Располагается в коллекциях: | Статьи НИУ «Институт ядерных проблем» |
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33381595.pdf | 1 MB | Adobe PDF | Открыть |
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