Constituent quark model for nuclear stopping in high energy nuclear collisions
- Department of Physics, Tohoku University, Sendai, 980-77 (Japan)
We study nuclear stopping in high energy nuclear collisions using the constituent quark model. It is assumed that wounded nucleons with a different number of interacted quarks hadronize in different ways. The probabilities of having such wounded nucleons are evaluated for proton-proton, proton-nucleus, and nucleus-nucleus collisions. After examining our model in proton-proton 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 {sup 32}S+{sup 32}S at E{sub lab}=200A GeV and {sup 208}Pb+{sup 208}Pb at E{sub lab}=160A GeV. Theoretical predictions are also given for proton rapidity distribution in {sup 197}Au+{sup 197}Au at {radical}(s)=200A GeV (BNL-RHIC). We predict that the nearly baryon-free region will appear in the midrapidity region and the rapidity shift is{l_angle}{Delta}{ital y}{r_angle}=2.24.
- OSTI ID:
- 450506
- Journal Information:
- Physical Review, C, Vol. 55, Issue 2; Other Information: PBD: Feb 1997
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
QUARK MODEL
STOPPING POWER
PROTON-PROTON INTERACTIONS
REACTION KINETICS
PROTON REACTIONS
COMPOUND-NUCLEUS REACTIONS
SULFUR 32 TARGET
SULFUR 32 REACTIONS
HEAVY ION FUSION REACTIONS
LEAD 208 TARGET
LEAD 208 REACTIONS
GOLD 197 TARGET
GOLD 197 REACTIONS
TEV RANGE 01-10
TEV RANGE 10-100
PARTICLE RAPIDITY
ENERGY LOSSES