Measurement of the Higgs Boson Mass and Width Using the Four-Lepton Final State in Proton-Proton Collisions at √s=13 TeV
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Date
2025
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Publisher
Amer Physical Soc
Abstract
A measurement of the Higgs boson mass and width via its decay to two Z bosons is presented. Proton-proton collision data collected by the CMS experiment, corresponding to an integrated luminosity of 138 fb(-1) at a center-of-mass energy of 13 TeV, is used. The invariant mass distribution of four leptons in the on-shell Higgs boson decay is used to measure its mass and constrain its width. This yields the most precise single measurement of the Higgs boson mass to date, 125.04 +/- 0.12 GeV, and an upper limit on the width Gamma(H) < 330 MeV at 95% confidence level. A combination of the on- and off-shell Higgs boson production decaying to four leptons is used to determine the Higgs boson width, assuming that no new virtual particles affect the production, a premise that is tested by adding new heavy particles in the gluon fusion loop model. This result is combined with a previous CMS analysis of the off-shell Higgs boson production with decay to two leptons and two neutrinos, giving a measured Higgs boson width of 3.0(-1.5)(+2.0) MeV, in agreement with the standard model prediction of 4.1 MeV. The strength of the off-shell Higgs boson production is also reported. The scenario of no off-shell Higgs boson production is excluded at a confidence level corresponding to 3.8 standard deviations.
Description
Sandro, Fonseca De Souza/0000-0001-7830-0837; D'Enterria, David/0000-0002-5754-4303; Tiras, Emrah/0000-0002-5628-7464; Gerosa, Raffaele/0000-0001-8359-3734; Cussans, David/0000-0001-8192-0826; Lai, Yihui/0000-0002-7795-8693; Jin, Weijie/0009-0009-8976-7702; Alverson, George/0000-0001-6651-1178; Hall, Geoffrey/0000-0002-6299-8385; Wittich, Peter/0000-0002-7401-2181; Garcia, Francisco/0000-0002-4023-7964; Ventura, Sandro/0000-0002-8938-2193; Vischia, Pietro/0000-0002-7088-8557; Grosso, Gaia/0000-0002-8303-3291; Whalen, Kathleen/0000-0002-9383-8763; Trevisani, Nicolo/0000-0002-5223-9342; Zhang, Licheng/0000-0001-7947-9007; Khvedelidze, Arsen/0000-0002-5953-0140; Al Kadhim, Ali/0000-0003-3490-8407; Vannerom, David/0000-0002-2747-5095; Csanad, Mate/0000-0002-3154-6925; Singh, Jasbir/0000-0001-9029-2462; Moon, Chang-Seong/0000-0001-8229-7829; Vami, Tamas Almos/0000-0002-0959-9211; Hussain, Priya Sajid/0000-0002-4825-5278; Moureaux, Louis/0000-0002-2310-9266; Sahasransu, Abanti Ranadhir/0000-0003-1505-1743; Rebello Teles, Patricia/0000-0001-9029-8506;
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Turkish CoHE Thesis Center URL
WoS Q
Q1
Scopus Q
Q1
Source
Physical Review D
Volume
111
Issue
9