Title
Observation of exclusive electron-positron production in hadron-hadron collisions Observation of exclusive electron-positron production in hadron-hadron collisions
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
98(2007) :11 , p. 112001,1-112001,7
ISSN
0031-9007
ISI
000244959300019
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We present the first observation of exclusive e+e- production in hadron-hadron collisions, using pp&#773; 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&#773; →p+e+e-+p&#773; through two-photon exchange. The measured cross section is 1.6-0.3+0.5(stat)±0.3(syst)  pb. This agrees with the theoretical prediction of 1.71±0.01  pb.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/3baf5c/c94eba8f.pdf
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