Constituent quark model for nuclear stopping in high energy nuclear collisions
نویسندگان
چکیده
We study the nuclear stopping in high energy nuclear collisions using the constituent quark model. It is assumed that wounded nucleons with different number of interacted quarks hadronize in different ways. The probabilities of having such wounded nucleons are evaluated for proton-proton, protonnucleus and nucleus-nucleus collisions. After examining our model in protonproton and proton-nucleus collisions and fixing the hadronization functions, it is extended to nucleus-nucleus collisions. It is used to calculate the rapidity distribution and the rapidity shift of final state protons in nucleus-nucleus collisions. The computed results are in good agreement with the experimental data on 32S + 32S at Elab = 200 AGeV and 208Pb + 208Pb at Elab = 160 AGeV. Theoretical predictions are also given for proton rapidity distribution in 197Au+ 197Au at √ s = 200 AGeV (BNL-RHIC). We predict that the nearly baryon free region will appear in the midrapidity region and the rapidity shift is 〈∆y〉 = 2.22. 25.75, 12.39, 25.40.E, 13.85 Typeset using REVTEX 1
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