UNIGE document Scientific Article
previous document  unige:38431  next document
add to browser collection

Search for Exclusive γγ Production in Hadron-Hadron Collision

CollaborationWith : Campanelli, Mario / Clark, Allan Geoffrey / Hamilton, Andrew / Lefevre, Régis / Moed, Shulamit / Sfyrla, Anna / Shreyber, Irina / Vallecorsa, Sofia / Wu, Xin
Published in Physical Review Letters. 2007, vol. 99, no. 24, p. 242002
Abstract We have searched for exclusive γγ production in proton-antiproton collisions at s√=1.96  TeV, using 532  pb−1 of integrated luminosity taken by the run II Collider Detector at Fermilab. The event signature requires two electromagnetic showers, each with transverse energy ET>5  GeV and pseudorapidity |η|<1.0, with no other particles detected in the event. Three candidate events are observed. We discuss the consistency of the three events with γγ, π0π0, or ηη production. The probability that other processes fluctuate to ≥3 events is 1.7×10−4. An upper limit on the cross section of pp→p+γγ+p production is set at 410 fb with 95% confidence level.
Full text
(ISO format)
CDF COLLABORATION. Search for Exclusive γγ Production in Hadron-Hadron Collision. In: Physical Review Letters, 2007, vol. 99, n° 24, p. 242002. doi: 10.1103/PhysRevLett.99.242002 https://archive-ouverte.unige.ch/unige:38431

266 hits



Deposited on : 2014-07-03

Export document
Format :
Citation style :