Measurement of Higgs boson production in the diphoton decay channel in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector

ATLAS Collaboration

研究成果: Article同行評審

180 引文 斯高帕斯(Scopus)

摘要

A measurement of the production processes of the recently discovered Higgs boson is performed in the two-photon final state using 4.5 fb-1of proton-proton collisions data at √s = 7 TeV and 20.3 fb-1at √s = 8 TeV collected by the ATLAS detector at the Large Hadron Collider. The number of observed Higgs boson decays to diphotons divided by the corresponding Standard Model prediction, called the signal strength, is found to be μ = 1.17 ± 0.27 at the value of the Higgs boson mass measured by ATLAS, mH= 125.4 GeV. The analysis is optimized to measure the signal strengths for individual Higgs boson production processes at this value of mH. They are found to be μggF= 1.32 ± 0.38, μVBF= 0.8 ± 0.7, μWH= 1.0 ± 1.6, μZH= 0.1+3.7 -0.1, and μtt¯H= 1.6+2.7 -1.8, for Higgs boson production through gluon fusion, vector-boson fusion, and in association with a W or Z boson or a top-quark pair, respectively. Compared with the previously published ATLAS analysis, the results reported here also benefit from a new energy calibration procedure for photons and the subsequent reduction of the systematic uncertainty on the diphoton mass resolution. No significant deviations from the predictions of the Standard Model are found.

原文English
文章編號112015
期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
90
發行號11
DOIs
出版狀態Published - 2014 十二月 24

All Science Journal Classification (ASJC) codes

  • 核能與高能物理
  • 物理與天文學(雜項)

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