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Discovery of Jet Quenching at RHIC and the Opacity of the Produced Gluon Plasma

P. Levai·G. Papp·G. Fai·M. Gyulassy·G. G. Barnafoldi·I. Vitev·Y. Zhang
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Abstract

The predicted quenching of jets in A+A at RHIC energies has been discovered by STAR and PHENIX in preliminary data reported at this conference. We apply the GLV theory of QCD radiative energy loss to estimate the opacity, L/λ_g, of the gluon plasma produced in Au+Au collisions at 130 AGeV. We show that (in contrast to the factor of two Cronin enhancement of π^0 found at the SPS by WA98) the factor of 5-8 suppression of p_T \sim 2-4 GeV π^0 reported by PHENIX can be accounted for with an effective static plasma opacity L/λ_g \approx 3-4.

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P. Levai, G. Papp, G. Fai, M. Gyulassy, G. G. Barnafoldi, I. Vitev, Y. Zhang. 2001-04-10. Discovery of Jet Quenching at RHIC and the Opacity of the Produced Gluon Plasma. https://doi.org/10.1016/s0375-9474(01)01445-2

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