Coherent rho(0) production in ultraperipheral heavy-ion collisions.
The STAR Collaboration reports the first observation of exclusive rho(0) photoproduction, AuAu-->AuAurho(0), and rho(0) production accompanied by mutual nuclear Coulomb excitation, AuAu-->Au*Au*rho(0), in ultraperipheral heavy-ion collisions. The rho(0) have low transverse momenta, consistent with coherent coupling to both nuclei. The cross sections at sqrt[s(NN)]=130 GeV agree with theoretical predictions treating rho(0) production and Coulomb excitation as independent processes.
Adler
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Argonne National Laboratory, Argonne, IL 60439, USA.
Ahammed
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Allgower
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Amonett
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Anderson
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Averichev
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Balewski
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Brandin
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Cadman
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Calderón de la Barca Sánchez
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Cardenas
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Carroll
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Castillo
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Castro
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Cebra
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Chaloupka
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Chattopadhyay
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Chen
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Chikanian
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Christie
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Hippolyte
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Hoffmann
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Huang
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