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10.1103-PhysRevD.91.012006.pdf (1.52 MB)

Measurements of Higgs boson production and couplings in the four-lepton channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector

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posted on 2023-06-09, 05:52 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, et al. The ATLAS Collaboration
The final ATLAS Run 1 measurements of Higgs boson production and couplings in the decay channel H?ZZ*?l+l-l'+l'-, where l,l'=e or µ, are presented. These measurements were performed using pp collision data corresponding to integrated luminosities of 4.5 and 20.3??fb-1 at center-of-mass energies of 7 and 8 TeV, respectively, recorded with the ATLAS detector at the LHC. The H?ZZ*?4l signal is observed with a significance of 8.1 standard deviations, with an expectation of 6.2 standard deviations, at mH=125.36??GeV, the combined ATLAS measurement of the Higgs boson mass from the H??? and H?ZZ*?4l channels. The production rate relative to the Standard Model expectation, the signal strength, is measured in four different production categories in the H?ZZ*?4l channel. The measured signal strength, at this mass, and with all categories combined, is 1.44+0.40-0.33. The signal strength for Higgs boson production in gluon fusion or in association with tt¯ or bb¯ pairs is found to be 1.7+0.5-0.4, while the signal strength for vector-boson fusion combined with WH/ZH associated production is found to be 0.3+1.6-0.9.

Funding

ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

2470-0010

Publisher

American Physical Society

Issue

1

Volume

91

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2017-04-25

First Open Access (FOA) Date

2017-04-25

First Compliant Deposit (FCD) Date

2017-04-25

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