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Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at √s = 13 TeV

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dc.contributor.authorSirunyan, A. M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAmbrogi, F.
dc.contributor.authorMatveev, V.
dc.contributor.authorBychkova, O.
dc.contributor.authorChistov, R.
dc.contributor.authorDanilov, M.
dc.contributor.authorPolikarpov, S.
dc.contributor.authorTarkovskii, E.
dc.contributor.authorМатвеев, Виктор Анатольевич
dc.contributor.authorЧистов, Руслан Николаевич
dc.contributor.authorДанилов, Михаил Владимирович
dc.contributor.authorПоликарпов, Сергей Михайлович
dc.date.accessioned2024-11-22T06:50:09Z
dc.date.available2024-11-22T06:50:09Z
dc.date.issued2019
dc.description.abstract© 2019, The Author(s).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.].
dc.identifier.citationSearch for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at √s = 13 TeV / Sirunyan, A.M. [et al.] // Journal of High Energy Physics. - 2019. - 2019. - № 10. - 10.1007/JHEP10(2019)139
dc.identifier.doi10.1007/JHEP10(2019)139
dc.identifier.urihttps://www.doi.org/10.1007/JHEP10(2019)139
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85074147634&origin=resultslist
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dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/19723
dc.relation.ispartofJournal of High Energy Physics
dc.titleSearch for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at √s = 13 TeV
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue10
oaire.citation.volume2019
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