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001-es BibID:	BIBFORM122646
035-os BibID:	(Scopus)85193357686
Első szerző:	CMS Collaboration
Cím:	Search for exotic decays of the Higgs boson to a pair of pseudoscalars in the [mu][mu]bb and [tau][tau]bb final states / CMS Collaboration
Dátum:	2024
ISSN:	1434-6052
Megjegyzések:	A search for exotic decays of the Higgs boson (H) with a mass of 125GeV to a pair of light pseudoscalars a1 is performed in final states where one pseudoscalar decays to two b quarks and the other to a pair of muons or tau leptons. A data sample of proton-proton collisions at root s=13TeV corresponding to an integrated luminosity of 138fb-1 recorded with the CMS detector is analyzed. No statistically significant excess is observed over the standard model backgrounds. Upper limits are set at 95% confidence level (CL) on the Higgs boson branching fraction to [mu][mu]bb and to [tau][tau]bb, via a pair of a1s. The limits depend on the pseudoscalar mass ma1 and are observed to be in the range (0.17-3.3)x10-4 and (1.7-7.7)x10-2 in the [mu][mu]bb and [tau][tau]bb final states, respectively. In the framework of models with two Higgs doublets and a complex scalar singlet (2HDM+S), the results of the two final states are combined to determine upper limits on the branching fraction B(H-->a1a1-->llbb) at 95% CL, with l being a muon or a tau lepton. For different types of 2HDM+S, upper bounds on the branching fraction B(H-->a1a1) are extracted from the combination of the two channels. In most of the Type II 2HDM+S parameter space, B(H-->a1a1) values above 0.23 are excluded at 95% CL for ma1 values between 15 and 60GeV.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Bosons Charged particles Tellurium compounds Vanadium compounds
Megjelenés:	The European Physical Journal C. - 84 : 5 (2024), p. 1-38. -
További szerzők:	Bartók Márton (fizikus) Raics Péter (1944-) (fizikus) Ujvári Balázs (1977-) (fizikus) Zilizi Gyula (1965-) (fizikus) Karancsi János (1987-) (fizikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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