Observation of Exclusive Charmonium Production and γγ→μ+μ- in pp̅ Collisions at √s=1.96  TeV

Show full item record

Permalink

http://hdl.handle.net/10138/24421

Citation

Aaltonen , T , Mehtala , P , Orava , R , Maki , T , Saarikko , H , Osterberg , K & CDF collaboration 2009 , ' Observation of Exclusive Charmonium Production and γγ→μ+μ- in pp̅ Collisions at √s=1.96  TeV ' Physical Review Letters , vol 102 , no. 24 , pp. 242001 . , 10.1103/PhysRevLett.102.242001

Title: Observation of Exclusive Charmonium Production and γγ→μ+μ- in pp̅ Collisions at √s=1.96  TeV
Author: Aaltonen, T.; Mehtala, P.; Orava, R.; Maki, T.; Saarikko, H.; Osterberg, K.; CDF collaboration
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Belongs to series: Physical Review Letters
ISSN: 0031-9007
Abstract: We have observed the reactions p+pbar --> p+X+pbar, with X being a centrally produced J/psi, psi(2S) or chi_c0, and gamma+gamma --> mu+mu-, in proton- antiproton collisions at sqrt{s} = 1.96 TeV using the Run II Collider Detector at Fermilab. The event signature requires two oppositely charged muons, each with pseudorapidity |eta| mu+mu-. Events with a J/psi and an associated photon candidate are consistent with exclusive chi_c0 production through double pomeron exchange. The exclusive vector meson production is as expected for elastic photo- production, gamma+p --> J/psi(psi(2S)) + p, which is observed here for the first time in hadron-hadron collisions. The cross sections ds/dy(y=0) for p + pbar --> p + X + pbar with X = J/psi, psi(2S) orchi_c0 are 3.92+/-0.62 nb, 0.53+/-0.14 nb, and 75+/-14 nb respectively. The cross section for the continuum, with |eta(mu+/-)|
Peer review status: Peer reviewed
URI: http://hdl.handle.net/10138/24421
Date: 2009
Subject: hep-ex
114 Physical sciences


Files in this item

Total number of downloads: Loading...

Files Size Format View
0902.1271v4 186.0Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record