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

DSpace/Manakin Repository

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

Show full item record

Title: 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
Author(s):
Aad, G.;
Abbott, B.;
Abdallah, J.;
Abdel Khalek, S.;
Abdinov, O.;
Aben, R.;
Abi, B.;
Izen, Joseph M.;
Leyton, Michael;
Lou, Xinchou;
Namasivayam, Harisankar;
Reeves, Kendall;
ATLAS Collaboration
Date Created: 2014-12-24
Format: Text
Item Type: Article
Keywords: W bosons
Z bosons
Higgs bosons
Protons
Abstract: A measurement of the production processes of the recently discovered Higgs boson is performed in the two-photon final state using 4.5 fb⁻¹ of proton-proton collisions data at √s = 7 TeV and 20.3 fb⁻¹ at √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, m_H = 125.4 GeV. The analysis is optimized to measure the signal strengths for individual Higgs boson production processes at this value of m_H. They are found to be μ_{ggF} = 1.32 ± 0.38, μ_{VBF} = 0.8 ± 0.7, μ_{WH} = 1.0 ± 1.6, μ_{ZH} = 0.1{−0.1} ^{+3.7}, and μ_{tt̅H} = 1.6 {−1.8} ^{+ 2.7} , 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.
Publisher: American Physical Society
ISSN: 1550-7998
Source: Physical Review D - Particles, Fields, Gravitation and Cosmology
Link to Related Resource: http://dx.doi.org/10.1103/PhysRevD.90.112015
Persistent Link: http://hdl.handle.net/10735.1/4301
Bibliographic Citation: Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, et al. 2014. "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." Physical Review D - Particles, Fields, Gravitation and Cosmology 90(11), doi:10.1103/PhysRevD.90.112015
Terms of Use: CC-BY 3.0 (Attribution)
© 2014 CERN, for the ATLAS Collaboration

Files in this item

Files Size Format View
NSM-JMIzen-271694.45.pdf 1.507Mb PDF View/Open ARTICLE

This item appears in the following Collection(s)


Show full item record

CC-BY 3.0 (Attribution) Except where otherwise noted, this item's license is described as CC-BY 3.0 (Attribution)