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001-es BibID:	BIBFORM119079
035-os BibID:	(Scopus)85140310896 (WoS)000870649900005
Első szerző:	CMS Collaboration
Cím:	Measurement of the Higgs boson width and evidence of its off-shell contributions to ZZ production / CMS Collaboration
Dátum:	2022
ISSN:	1745-2473
Megjegyzések:	Since the discovery of the Higgs boson in 2012, detailed studies of its properties have been ongoing. Besides its mass, its width-related to its lifetime-is an important parameter. One way to determine this quantity is to measure its off-shell production, where the Higgs boson mass is far away from its nominal value, and relating it to its on-shell production, where the mass is close to the nominal value. Here we report evidence for such off-shell contributions to the production cross-section of two Z bosons with data from the CMS experiment at the CERN Large Hadron Collider. We constrain the total rate of the off-shell Higgs boson contribution beyond the Z boson pair production threshold, relative to its standard model expectation, to the interval [0.0061,2.0] at the 95% confidence level. The scenario with no off-shell contribution is excluded at a p-value of 0.0003 (3.6 standard deviations). We measure the width of the Higgs boson as [gamma]_H=3.2_{-1.7}^{+2.4}MeV, in agreement with the standard model expectation of 4.1 MeV. In addition, we set constraints on anomalous Higgs boson couplings to W and Z boson pairs.
Tárgyszavak:	Természettudományok Fizikai tudományok magyar nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Nature Physics. - 18 : 11 (2022), p. 1-30. -
További szerzők:	Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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