rho(0) photoproduction in AuAu collisions at root s(NN)=62.4 GeV measured with the STAR detector Academic Article uri icon


  • 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 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 0 photoproduction with nuclear breakup is mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is 4.40.6, 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. 2012 American Physical Society.

published proceedings


altmetric score

  • 0.5

author list (cited authors)

  • Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alakhverdyants, A. V., Alekseev, I., Alford, J., ... Zoulkarneeva, Y.

citation count

  • 21

publication date

  • January 2012