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

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

2002-06-07

arxiv.org/abs/nucl-ex/0206004v2

Phys.Rev.Lett.89:272302,2002

Physics

Nuclear Physics

Nuclear Experiment

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

Scientific paper

10.1103/PhysRevLett.89.272302

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.

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