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Title: γ production as a probe for early state dynamics in high energy nuclear collisions at RHIC

γ production in heavy ion collisions at RHIC energy is investigated. While the transverse momentum spectra of the ground state γ(1s) are controlled by the initial state Cronin effect, the excited bb⁻ states are characterized by the competition between the cold and hot nuclear matter effects and sensitive to the dissociation temperatures determined by the heavy quark potential. We emphasize that it is necessary to measure the excited heavy quark states in order to extract the early stage information in high energy nuclear collisions at RHIC.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
1209446
Grant/Contract Number:
AC03-76SF00098
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 697; Journal Issue: 1; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Sponsoring Org:
USDOE
Country of Publication:
Netherlands
Language:
English