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001-es BibID:	BIBFORM122352
035-os BibID:	(WoS)000492982300001 (Scopus)85074147634
Első szerző:	CMS Collaboration
Cím:	Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at root{s} = 13 TeV / CMS Collaboration
Dátum:	2019
ISSN:	1126-6708 1029-8479
Megjegyzések:	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.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Beyond Standard Model Hadron-Hadron scattering (experiments) Photon production
Megjelenés:	Journal of High Energy Physics. - 2019 : 10 (2019), p. 1-36. -
További szerzők:	Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Teyssier, Daniel Francois Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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