High p_T hadron spectra in high-energy heavy-ion collisions

Details High p_T hadron spectra in high-energy heavy-ion collisions High p_T hadron spectra in high-energy heavy-ion collisions

1999-07-22

arxiv.org/abs/nucl-th/9907093v1

Nucl.Phys. A661 (1999) 609-612

Physics

Nuclear Physics

Nuclear Theory

4 pages in Elsevier LaTex with 2 postscript figures. Talk at Quark Matter '99 to be published in the proceedings

Scientific paper

We calculate the hadron spectra in high-energy pp, pA and AA collisions within a pQCD parton model. Analyses of experimental data show that the modification of the spectra in pA and AA as compared to that in $pp$ collisions is consistent with multiple parton scattering scenario and is dictated by the transition from absorptive soft interaction at low p_T to incoherent hard parton scattering at high p_T. This analysis not only sheds new light on the limits to the physics analysis based on thermal fire-ball models but also provides a more quantitative baseline results on which one can study the effects of parton energy loss in the hadron spectra at high p_T.

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