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ATLAS_Collaboration_Measurements_of_fiducial_and_differential_cross_sections_for_Higgs_boson_production_etc.pdf (1.15 MB)

Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at sv=8 TeV with ATLAS

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journal contribution
posted on 2023-06-08, 21:41 authored by Alessandro CerriAlessandro Cerri, C Chavez Barajas, Antonella De SantoAntonella De Santo, Z J Grout, C T Potter, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, Y Shehu, Mark SuttonMark Sutton, Iacopo Vivarelli, others (ATLAS collaboration)
Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of sv=8 TeV. The analysis is performed in the H ? ?? decay channel using 20.3 fb-1 of data recorded by the ATLAS experiment at the CERN Large Hadron Collider. The signal is extracted using a fit to the diphoton invariant mass spectrum assuming that the width of the resonance is much smaller than the experimental resolution. The signal yields are corrected for the effects of detector inefficiency and resolution. The pp ? H ? ?? fiducial cross section is measured to be 43.2 ±9.4(stat.) -?2.9 +?3.2 (syst.) ±1.2(lumi)fb for a Higgs boson of mass 125.4GeV decaying to two isolated photons that have transverse momentum greater than 35% and 25% of the diphoton invariant mass and each with absolute pseudorapidity less than 2.37. Four additional fiducial cross sections and two cross-section limits are presented in phase space regions that test the theoretical modelling of different Higgs boson production mechanisms, or are sensitive to physics beyond the Standard Model. Differential cross sections are also presented, as a function of variables related to the diphoton kinematics and the jet activity produced in the Higgs boson events. The observed spectra are statistically limited but broadly in line with the theoretical expectations.

Funding

Consolidated Grant; G0927; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/K001329/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Journal of High Energy Physics

ISSN

1029-8479

Publisher

Institute of Physics

Issue

9

Volume

2014

Department affiliated with

  • Physics and Astronomy Publications

Notes

Part of the ATLAS Collaboration

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2015-07-17

First Open Access (FOA) Date

2015-07-17

First Compliant Deposit (FCD) Date

2015-07-17

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