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Titles listMeasurement of isolated-photon pair production in pp collisions at √s=7 TeV with the ATLAS detector
Titles listMeasurement of isolated-photon pair production in pp collisions at √s=7 TeV with the ATLAS detector
Scientific Article
unige:40042 
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Measurement of isolated-photon pair production in pp collisions at √s=7 TeV with the ATLAS detector |
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| Collaboration | With : Abdelalim Aly, Ahmed Aly / Alexandre, Gauthier / Backes, Moritz / Barone, Gaetano / Bell, Paul / Bell, William / Benhar Noccioli, Eleonora / Blondel, Alain / Bucci, Francesca / Clark, Allan Geoffrey / Dao, Valerio / Doglioni, Caterina / Ferrere, Didier / Gadomski, Szymon / Gonzalez Sevilla, Sergio / Goulette, Marc / Iacobucci, Giuseppe / La Rosa, Alessandro / Lister, Alison / Martin Dit Latour, Bertrand / Mermod, Philippe / Mora Herrera, Maria Clemencia Rosario / Nektarijevic, Snezana / Nikolics, Katalin / Pasztor, Arpad / Picazio, Attilio / Pohl, Martin / Rosbach, Kilian / Rosselet, Laurent / Wu, Xin | |
| Published in | Journal of High Energy Physics. 2013, vol. 01, no. 086, p. 41 | |
| Abstract | The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at √s=7TeV . The full data set collected in 2011, corresponding to an integrated luminosity of 4.9 fb−1, is used. The amount of background, from hadronic jets and isolated electrons, is estimated with data-driven techniques and subtracted. The total cross section, for two isolated photons with transverse energies above 25 GeV and 22 GeV respectively, in the acceptance of the electromagnetic calorimeter (|η| < 1.37 and 1.52 < |η| < 2.37) and with an angular separation ΔR > 0.4, is 44.0+3.2−4.2 pb. The differential cross sections as a function of the di-photon invariant mass, transverse momentum, azimuthal separation, and cosine of the polar angle of the largest transverse energy photon in the Collins-Soper di-photon rest frame are also measured. The results are compared to the prediction of leading-order parton-shower and next-to-leading-order and next-to-next-to-leading-order parton-level generators. | |
| Keywords | Hadron-Hadron Scattering | |
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Article (Published version) (939 Kb) - Free access Other version: http://link.springer.com/article/10.1007%2FJHEP01%282013%29086 |
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| Citation (ISO format) | ATLAS COLLABORATION. Measurement of isolated-photon pair production in pp collisions at √s=7 TeV with the ATLAS detector. In: Journal of High Energy Physics, 2013, vol. 01, n° 086, p. 41. doi: 10.1007/JHEP01(2013)086 https://archive-ouverte.unige.ch/unige:40042 |
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