Coherent vector-meson photoproduction with nuclear breakup in relativistic heavy-ion collisions.
Relativistic heavy ions are copious sources of virtual photons. The large photon flux gives rise to a substantial photonuclear interaction probability at impact parameters where no hadronic interactions can occur. Multiple photonuclear interactions in a single collision are possible. In this Letter, we use mutual Coulomb excitation of both nuclei as a tag for moderate-impact-parameter collisions. We calculate the cross section for coherent vector-meson production accompanied by mutual excitation and show that the median impact parameter is much smaller than for untagged production. The vector-meson rapidity and transverse-momentum distribution are very different from untagged exclusive vector-meson production.
Baltz
Anthony J
AJ
Brookhaven National Laboratory, Upton, New York 11973, USA.
Klein
Spencer R
SR
Nystrand
Joakim
J