Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-10-12
Phys.Rev.C84:064913,2011
Physics
Nuclear Physics
Nuclear Theory
8 pages, 7 figures
Scientific paper
10.1103/PhysRevC.84.064913
We investigate the influence of the nucleon-nucleon collision profile (probability of interaction as a function of the nucleon-nucleon impact parameter) in the wounded nucleon model and its extensions on several observables measured in relativistic heavy-ion collisions. We find that the participant eccentricity coefficient, $\epsilon^\ast$, as well as the higher harmonic coefficients, $\epsilon_n^\ast$, are reduced by 10-20% for mid-peripheral collisions when the realistic (Gaussian) profile is used, as compared to the case with the commonly-used hard-sphere profile. Similarly, the multiplicity fluctuations, treated as the function of the number of wounded nucleons in one of the colliding nuclei, are reduced by 10-20%. This demonstrates that the Glauber Monte Carlo codes should necessarily use the realistic nucleon-nucleon collision profile in precision studies of these observables. The Gaussian collision profile is built-in in {\tt GLISSANDO}.
Broniowski Wojciech
Rybczynski Maciej
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