Measurement of isolated-photon pair production in pp collisions at root s=7 TeV with the ATLAS detector

Measurement of isolated-photon pair production in pp collisions at root s=7 TeV with the ATLAS detector

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, fro...

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Hauptverfasser: Buanes, Trygve, Burgess, Thomas, Eigen, Gerald, Kastanas, Alex, Liebig, Wolfgang, Lipniacka, Anna, Rosendahl, Peter Lundgaard, Sandaker, Heidi, Sjursen, Therese B, Stugu, Bjarne Sandvik, Tonoyan, Arshak, Ugland, Maren, Bugge, Lars, Buran, Torleiv, Cameron, David Gordon, Czyczula, Zofia, Gjelsten, Børge Kile, Gramstad, Eirik, Lund, Esben, Ould-Saada, Farid, Pajchel, Katarina, Pylypchenko, Yuriy, Read, Alexander Lincoln, Røhne, Ole Myren, Samset, Bjørn Hallvard, Smestad, Lillian, Stapnes, Steinar, Strandlie, Are, Aad, Georges, Abajyan, Tatevik, Abbott, Brad, Abdallah, Jalal, Abdel Khalek, Samah, Abdelalim, Ahmed Ali, Abdesselam, Abdel, Abdinov, Ovsat Bahram oglu, Abi, Babak, Abolins, Maris, AbouZeid, Hass, Abramowicz, Halina, Abreu, Henso, Acerbi, Emilio, Adams, David, Addy, Tetteh N, Adelman, Jareed, Adomeit, Stefanie, Adragna, Paolo, Adye, Tim, Aefsky, Scott Alan, Aharrouche, Mohamed, ATLAS, Collaboration
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Hadron-Hadron Scattering
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Zusammenfassung: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|