Coherent ρ0 Production in Ultraperipheral Heavy-Ion Collisions
Abstract
The STAR Collaboration reports the first observation of exclusive ρ0 photoproduction, AuAu→AuAuρ0, and ρ0 production accompanied by mutual nuclear Coulomb excitation, AuAu→Au⋆Au⋆ρ0, in ultraperipheral heavy-ion collisions. The ρ0 have low transverse momenta, consistent with coherent coupling to both nuclei. The cross sections at (sNN)=130 GeV agree with theoretical predictions treating ρ0 production and Coulomb excitation as independent processes.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2002
- DOI:
- 10.1103/PhysRevLett.89.272302
- arXiv:
- arXiv:nucl-ex/0206004
- Bibcode:
- 2002PhRvL..89A2302A
- Keywords:
-
- 25.75.Dw;
- 13.60.-r;
- 25.20.-x;
- Particle and resonance production;
- Photon and charged-lepton interactions with hadrons;
- Photonuclear reactions;
- High Energy Physics - Experiment;
- Nuclear Experiment
- E-Print:
- 6 pages, 5 figures, 2 tables, submitted to Phys. Rev. Lett updated version, one new figure and table