ρ0 photoproduction in AuAu collisions at √sNN=62.4 GeV measured with the STAR detector
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Description
Abstract
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 ρ0 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 ρ0 photoproduction with nuclear breakup is 10.5±1.5±1.6 mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is 4.4±0.6, less than is predicted by most theoretical models. It is, however, proportionally much larger than the previously observed 15%±55% increase between 130 GeV and 200 GeV.
Description
Advisor
Degree
Type
Keywords
Citation
STAR Collaboration. "ρ0 photoproduction in AuAu collisions at √sNN=62.4 GeV measured with the STAR detector." Physical Review C, 85, no. 1 (2012) American Physical Society: 14910. http://dx.doi.org/10.1103/PhysRevC.85.014910.