Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV

2014
Authors
Chatrchyan, S.Adžić, Petar
Đorđević, Miloš

Ekmedžić, Marko

Milošević, Jovan

Milenović, Predrag

Reković, Vladimir

CMS Collaboration (ukupan broj autora: 2228)
Article (Published version)
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A measurement of differential cross sections for the production of a pair of isolated photons in proton-proton collisions at root s = 7 TeV is presented. The data sample corresponds to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector. A data-driven isolation template method is used to extract the prompt diphoton yield. The measured cross section for two isolated photons, with transverse energy above 40 and 25 GeV respectively, in the pseudorapidity range vertical bar eta vertical bar LT 2.5, vertical bar eta vertical bar (sic) [1.44, 1.57] and with an angular separation Delta R GT 0.45, is 17.2 +/-0.2 (stat) +/-1.9 (syst) +/- 0.4 (lumi) pb. Differential cross sections are measured as a function of the diphoton invariant mass, the diphoton transverse momentum, the azimuthal angle difference between the two photons, and the cosine of the polar angle in the Collins-Soper reference frame of the diphoton system. The results are compared to theoretical predictions at le...ading, next-to-leading, and next-to-next-to-leading order in quantum chromodynamics.
Source:
European Physical Journal C. Particles and Fields, 2014, 74, 11Funding / projects:
- SCOAP3
DOI: 10.1140/epjc/s10052-014-3129-3
ISSN: 1434-6044; 1434-6052
WoS: 000347170900001
Scopus: 2-s2.0-84920093388
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VinčaTY - JOUR AU - Chatrchyan, S. AU - Adžić, Petar AU - Đorđević, Miloš AU - Ekmedžić, Marko AU - Milošević, Jovan AU - Milenović, Predrag AU - Reković, Vladimir PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/326 AB - A measurement of differential cross sections for the production of a pair of isolated photons in proton-proton collisions at root s = 7 TeV is presented. The data sample corresponds to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector. A data-driven isolation template method is used to extract the prompt diphoton yield. The measured cross section for two isolated photons, with transverse energy above 40 and 25 GeV respectively, in the pseudorapidity range vertical bar eta vertical bar LT 2.5, vertical bar eta vertical bar (sic) [1.44, 1.57] and with an angular separation Delta R GT 0.45, is 17.2 +/-0.2 (stat) +/-1.9 (syst) +/- 0.4 (lumi) pb. Differential cross sections are measured as a function of the diphoton invariant mass, the diphoton transverse momentum, the azimuthal angle difference between the two photons, and the cosine of the polar angle in the Collins-Soper reference frame of the diphoton system. The results are compared to theoretical predictions at leading, next-to-leading, and next-to-next-to-leading order in quantum chromodynamics. T2 - European Physical Journal C. Particles and Fields T1 - Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV VL - 74 IS - 11 DO - 10.1140/epjc/s10052-014-3129-3 ER -
@article{ author = "Chatrchyan, S. and Adžić, Petar and Đorđević, Miloš and Ekmedžić, Marko and Milošević, Jovan and Milenović, Predrag and Reković, Vladimir", year = "2014", abstract = "A measurement of differential cross sections for the production of a pair of isolated photons in proton-proton collisions at root s = 7 TeV is presented. The data sample corresponds to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector. A data-driven isolation template method is used to extract the prompt diphoton yield. The measured cross section for two isolated photons, with transverse energy above 40 and 25 GeV respectively, in the pseudorapidity range vertical bar eta vertical bar LT 2.5, vertical bar eta vertical bar (sic) [1.44, 1.57] and with an angular separation Delta R GT 0.45, is 17.2 +/-0.2 (stat) +/-1.9 (syst) +/- 0.4 (lumi) pb. Differential cross sections are measured as a function of the diphoton invariant mass, the diphoton transverse momentum, the azimuthal angle difference between the two photons, and the cosine of the polar angle in the Collins-Soper reference frame of the diphoton system. The results are compared to theoretical predictions at leading, next-to-leading, and next-to-next-to-leading order in quantum chromodynamics.", journal = "European Physical Journal C. Particles and Fields", title = "Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV", volume = "74", number = "11", doi = "10.1140/epjc/s10052-014-3129-3" }
Chatrchyan, S., Adžić, P., Đorđević, M., Ekmedžić, M., Milošević, J., Milenović, P.,& Reković, V.. (2014). Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV. in European Physical Journal C. Particles and Fields, 74(11). https://doi.org/10.1140/epjc/s10052-014-3129-3
Chatrchyan S, Adžić P, Đorđević M, Ekmedžić M, Milošević J, Milenović P, Reković V. Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV. in European Physical Journal C. Particles and Fields. 2014;74(11). doi:10.1140/epjc/s10052-014-3129-3 .
Chatrchyan, S., Adžić, Petar, Đorđević, Miloš, Ekmedžić, Marko, Milošević, Jovan, Milenović, Predrag, Reković, Vladimir, "Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at root s=7TeV" in European Physical Journal C. Particles and Fields, 74, no. 11 (2014), https://doi.org/10.1140/epjc/s10052-014-3129-3 . .