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

G. Aad; B. Abbott; J. Abdallah; S. Abdel Khalek; O. Abdinov; Mogens Dam; Jørn Dines Hansen; Jørgen Beck Hansen; Stefania Xella; Peter Henrik Hansen; Troels Christian Petersen; Lotte Ansgaard Thomsen; Sascha Mehlhase; Morten Dam Jørgensen; Almut Maria Pingel; Ask Emil Løvschall-Jensen; Alejandro Alonso Diaz; James William Monk; Lars Egholm Pedersen; Graig Wiglesworth; Gorm Aske Gram Krohn Galster

doi:10.1103/PhysRevD.90.112015

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

G. Aad, B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, Mogens Dam, Jørn Dines Hansen, Jørgen Beck Hansen, Stefania Xella, Peter Henrik Hansen, Troels Christian Petersen, Lotte Ansgaard Thomsen, Sascha Mehlhase, Morten Dam Jørgensen, Almut Maria Pingel, Ask Emil Løvschall-Jensen, Alejandro Alonso Diaz, James William Monk, Lars Egholm Pedersen, Graig WiglesworthGorm Aske Gram Krohn Galster

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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^-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, 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^+3.7 _-0.1, and μ_tt¯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.

Originalsprog	Engelsk
Artikelnummer	112015
Tidsskrift	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Vol/bind	90
Udgave nummer	11
ISSN	1550-7998
DOI	https://doi.org/10.1103/PhysRevD.90.112015
Status	Udgivet - 24 dec. 2014

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10.1103/PhysRevD.90.112015Licens: CC BY

PhysRevD.90.112015Forlagets udgivne version, 1,54 MBLicens: CC BY

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Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Dam, M., Hansen, J. D., Hansen, J. B., Xella, S., Hansen, P. H., Petersen, T. C., Thomsen, L. A., Mehlhase, S., Jørgensen, M. D., Pingel, A. M., Løvschall-Jensen, A. E., Alonso Diaz, A., Monk, J. W., Pedersen, L. E., ... Galster, G. A. G. K. (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), [112015]. https://doi.org/10.1103/PhysRevD.90.112015

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. / Aad, G.; Abbott, B.; Abdallah, J. et al.

I: Physical Review D (Particles, Fields, Gravitation and Cosmology), Bind 90, Nr. 11, 112015, 24.12.2014.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Aad, G, Abbott, B, Abdallah, J, Abdel Khalek, S, Abdinov, O, Dam, M , Hansen, JD , Hansen, JB , Xella, S , Hansen, PH , Petersen, TC, Thomsen, LA, Mehlhase, S, Jørgensen, MD, Pingel, AM, Løvschall-Jensen, AE, Alonso Diaz, A, Monk, JW, Pedersen, LE, Wiglesworth, G & Galster, GAGK 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), bind 90, nr. 11, 112015. https://doi.org/10.1103/PhysRevD.90.112015

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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",

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-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.",

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AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.

AU - Abdinov, O.

AU - Dam, Mogens

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Xella, Stefania

AU - Hansen, Peter Henrik

AU - Petersen, Troels Christian

AU - Thomsen, Lotte Ansgaard

AU - Mehlhase, Sascha

AU - Jørgensen, Morten Dam

AU - Pingel, Almut Maria

AU - Løvschall-Jensen, Ask Emil

AU - Alonso Diaz, Alejandro

AU - Monk, James William

AU - Pedersen, Lars Egholm

AU - Wiglesworth, Graig

AU - Galster, Gorm Aske Gram Krohn

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N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevD.90.112015

M3 - Journal article

SN - 2470-0010

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JO - Physical Review D

JF - Physical Review D

IS - 11

M1 - 112015

ER -

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

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