2011/10/31 by M. Rybczyński, Maciej Rybczyński, Wojciech Broniowski +1 · 1 citation
Mathematics · Physics and Astronomy · #Collision #Gas Dynamics and Kinetic Theory #Gaussian #Glauber #High-Energy Particle Collisions Research #Impact parameter #Nuclear physics #Nucleon #Observable #Particle physics #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Scattering #nucl-th
paper · pdf · doi:10.1103/physrevc.84.064913
published as Phys.Rev.C84:064913,2011 · 8 pages, 7 figures
openalex publication_date 2011/12/22 · arxiv created 2012/01/14 · arxiv updated 2014/03/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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, \ensuremathε*, as well as the higher harmonic coefficients, \ensuremathεn*, are reduced by 10--20% for midperipheral 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. Our study is relevant for hydrodynamic calculations which use the Glauber-model initial conditions. The Gaussian collision profile is built-in in glissando.