Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2011-07-22
Physics
Nuclear Physics
Nuclear Experiment
Scientific paper
Vector mesons may be photoproduced in relativistic heavy-ion collisions when a virtual photon emitted by one nucleus scatters from the other nucleus, emerging as a vector meson. The STAR Collaboration has previously presented measurements of coherent $\rho^0$ photoproduction at center of mass energies of 130 GeV and 200 GeV in AuAu collisions. Here, we present a measurement of the cross section at 62.4 GeV; we find that the cross section for coherent $\rho^0$ photoproduction with nuclear breakup is $10.5\pm1.5\pm 1.6$ mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is $2.8\pm0.6$, less than is predicted by most theoretical models. It is, however, proportionally much larger than the previously observed $15\pm 55$% increase between 130 GeV and 200 GeV.
Agakishiev G.
for the STAR Collaboration
No associations
LandOfFree
$ρ^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR 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 $ρ^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and $ρ^{0}$ Photoproduction in AuAu Collisions at $\sqrt{s_{NN}}$=62.4 GeV with STAR will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-667181