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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»

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