Coherent rho^0 Production in Ultra-Peripheral Heavy Ion Collisions

Abstract

The STAR collaboration reports the first observation of exclusive rho^0 photo-production, AuAu->AuAu rho^0, and rho^0 production accompanied by mutual nuclear Coulomb excitation, AuAu->Au*Au*rho^0, in ultra-peripheral heavy-ion collisions. The rho^0 have low transverse momenta, consistent with coherent coupling to both nuclei. The cross sections at sqrt(s_NN)=130GeV agree with theoretical predictions treating rho^0 production and Coulomb excitation as independent processes.

6 pages, 5 figures, 2 tables, submitted to Phys. Rev. Lett updated version, one new figure and table

References in corpus (5)

• Coherent gamma-gamma and gamma-A interactions in very peripheral collisions at relativistic ion colliders
• Multiplicity distribution and spectra of negatively charged hadrons in Au+Au collisions at sqrt(s_nn) = 130 GeV
• Coherent Vector Meson Photoproduction with Nuclear Breakup in Relativistic Heavy Ion Collisions
• Signals for black body limit in coherent ultraperipheral heavy ion collisions
• Measurement of Mutual Coulomb Dissociation in $\sqrt{s_{NN}}=130$ GeV Au+Au collisions at RHIC

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