Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2009-03-11
Phys.Lett.B679:321-329,2009
Physics
Nuclear Physics
Nuclear Experiment
345 authors from 52 institutions, 20 pages, 4 figures, 3 tables. Submitted to Physics Letters B. Plain text data tables for th
Scientific paper
10.1016/j.physletb.2009.07.061
We present the first measurement of photoproduction of J/psi and of two-photon production of high-mass e+e- pairs in electromagnetic (or ultra-peripheral) nucleus-nucleus interactions, using Au+Au data at sqrt(s_NN) = 200 GeV. The events are tagged with forward neutrons emitted following Coulomb excitation of one or both Au^{star} nuclei. The event sample consists of 28 events with m_{e+e-} > 2 GeV/c^2 with zero like-sign background. The measured cross sections at midrapidity of d\sigma / dy (J/psi + Xn, y=0) = 76 +/- 33 (stat) +/- 11 (syst) micro b and d^2\sigma/dm dy (e^+e^- + Xn, y=0) = 86 +/- 23 (stat) +/- 16 (syst) micro b/(GeV/c^2) for m_{e+e-} \in [2.0,2.8] GeV/c^2 are consistent with various theoretical predictions.
Afanasiev A.
PHENIX Collaboration
No associations
LandOfFree
Photoproduction of J/psi and of high mass e+e- in ultra-peripheral Au+Au collisions at sqrt(s_NN) = 200 GeV does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Photoproduction of J/psi and of high mass e+e- in ultra-peripheral Au+Au collisions at sqrt(s_NN) = 200 GeV, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoproduction of J/psi and of high mass e+e- in ultra-peripheral Au+Au collisions at sqrt(s_NN) = 200 GeV will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-124368