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Заглавие документа: | Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at √s = 13 TeV |
Авторы: | Drugakov, V. Mossolov, V. Suarez Gonzalez, J. CMS Collaboration |
Тема: | ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика |
Дата публикации: | 2019 |
Издатель: | Springer Verlag |
Библиографическое описание источника: | J High Energy Phys 2019;2019(10). |
Аннотация: | A search is presented for a Higgs boson that is produced in association with a Z boson and that decays to an undetected particle together with an isolated photon. The search is performed by the CMS Collaboration at the Large Hadron Collider using a data set corresponding to an integrated luminosity of 137 fb−1 recorded at a center-of-mass energy of 13 TeV. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for associated Higgs and Z boson production and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a mass of 125 GeV, assuming the standard model production cross section, this corresponds to an observed (expected) upper limit on this branching fraction of 4.6 (3.6)% at 95% confidence level. These are the first limits on Higgs boson decays to final states that include an undetected massless dark photon. [Figure not available: see fulltext.]. |
URI документа: | https://elib.bsu.by/handle/123456789/261191 |
DOI документа: | 10.1007/JHEP10(2019)139 |
Scopus идентификатор документа: | 85074147634 |
Финансовая поддержка: | Horizon 2020 Framework Programme (H2020),752730,765710;Science and Technology Facilities Council ( STFC),ST/N000242/1 |
Располагается в коллекциях: | Статьи НИУ «Институт ядерных проблем» |
Полный текст документа:
Файл | Описание | Размер | Формат | |
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Sirunyan2019_Article_SearchForDarkPhotonsInDecaysOf.pdf | 516,41 kB | Adobe PDF | Открыть |
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