We have searched for exclusive γγ production in proton-antiproton collisions at s=1.96TeV, using 532pb-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>5GeV 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 pp̄→p+γγ+p̄ production is set at 410 fb with 95% confidence level

CDF Collaboration, T. Aaltonen, A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, et al. (2007). Search for Exclusive gamma gamma Production in Hadron-Hadron Collisions. PHYSICAL REVIEW LETTERS, 99(24), 1-7 [10.1103/PhysRevLett.99.242002].

Search for Exclusive gamma gamma Production in Hadron-Hadron Collisions

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2007

Abstract

We have searched for exclusive γγ production in proton-antiproton collisions at s=1.96TeV, using 532pb-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>5GeV 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 pp̄→p+γγ+p̄ production is set at 410 fb with 95% confidence level
2007
CDF Collaboration, T. Aaltonen, A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, et al. (2007). Search for Exclusive gamma gamma Production in Hadron-Hadron Collisions. PHYSICAL REVIEW LETTERS, 99(24), 1-7 [10.1103/PhysRevLett.99.242002].
CDF Collaboration; T. Aaltonen; A. Abulencia; J. Adelman; T. Affolder; T. Akimoto; M. G. Albrow; S. Amerio; D. Amidei; A. Anastassov; K. Anikeev; A. A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/53679
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