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Observation of Exclusive Electron-Positron Production in Hadron-Hadron Collisions

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Donega, Mauro / Moed, Shulamit / Sfyrla, Anna / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2007, vol. 98, no. 11, p. 112001
Abstract We present the first observation of exclusive e+e− production in hadron-hadron collisions, using pp collision data at s√=1.96  TeV taken by the run II Collider Detector at Fermilab, and corresponding to an integrated luminosity of 532  pb−1. We require the absence of any particle signatures in the detector except for an electron and a positron candidate, each with transverse energy ET>5  GeV and pseudorapidity |η|<2. With these criteria, 16 events are observed compared to a background expectation of 1.9±0.3 events. These events are consistent in cross section and properties with the QED process pp→p+e+e−+p through two-photon exchange. The measured cross section is 1.6+0.5−0.3(stat)±0.3(syst)  pb. This agrees with the theoretical prediction of 1.71±0.01  pb.
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CDF COLLABORATION. Observation of Exclusive Electron-Positron Production in Hadron-Hadron Collisions. In: Physical Review Letters, 2007, vol. 98, n° 11, p. 112001. doi: 10.1103/PhysRevLett.98.112001 https://archive-ouverte.unige.ch/unige:38379

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Deposited on : 2014-07-01

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