J/{psi} production in Au+Au and Cu+Cu collisions at {radical}(s){sub NN}=200 GeV and the threshold model
- Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata 700 064 (India)
Using the quark gluon plasma (QGP) motivated threshold model, where all the J/{psi}'s are suppressed above a threshold density, we have analyzed the recent PHENIX data on the participant number dependence of the nuclear modification factor for J/{psi}'s, in Au+Au collisions, at RHIC energy, {radical}(s){sub NN}=200 GeV. Centrality dependence of midrapidity J/{psi} suppression in Au+Au collisions are well explained in the model for threshold density n{sub c}{approx_equal}3.6 fm{sup -2}. PHENIX data on J/{psi} suppression at forward rapidity data are not explained in the model. The analysis strongly supports deconfined matter formation in central Au+Au collisions at midrapidity. We have also analyzed the preliminary PHENIX data on J/{psi} suppression in Cu+Cu collisions. Cu+Cu data are not explained in the threshold model.
- OSTI ID:
- 20995221
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 75, Issue 4; Other Information: DOI: 10.1103/PhysRevC.75.044902; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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