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001-es BibID:	BIBFORM062451
035-os BibID:	(WoS)000368783600053 (Scopus)85040815540
Első szerző:	Khachatryan, V.
Cím:	Search for exotic decays of a Higgs boson into undetectable particles and one or more photons / V. Khachatryan, [Karancsi János] on behalf of The CMS Collaboration
Dátum:	2016
ISSN:	0370-2693
Megjegyzések:	A search is presented for exotic decays of a Higgs boson into undetectable particles and one or two isolated photons in pp collisions at a center-of-mass energy of 8 TeV. The data correspond to an integrated luminosity of up to 19.4 (fb) -1 collected with the CMS detector at the LHC. Higgs bosons produced in gluon-gluon fusion and in association with a Z boson are investigated, using models in which the Higgs boson decays into a gravitino and a neutralino or a pair of neutralinos, followed by the decay of the neutralino to a gravitino and a photon. The selected events are consistent with the background-only hypothesis, and limits are placed on the product of cross sections and branching fractions. Assuming a standard model Higgs boson production cross section, a 95% confidence level upper limit is set on the branching fraction of a 125 GeV Higgs boson decaying into undetectable particles and one or two isolated photons as a function of the neutralino mass. For this class of models and neutralino masses from 1 to 120 GeV an upper limit in the range of 7 to 13% is obtained. Further results are given as a function of the neutralino lifetime, and also for a range of Higgs boson masses.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban CMS Higgs Physics
Megjelenés:	Physics Letters B. - 753 (2016), p. 363-388. -
További szerzők:	Karancsi János (1987-) (fizikus) The CMS Collaboration
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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