Characteristic quantities of pion-emitting sources extracted by model-independent analysis in relativistic heavy ion collisions

2009/09/08 by Wei‐Ning Zhang, Wei-Ning Zhang, Zhitao Yang +2
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Pulsars and Gravitational Waves Research #hep-ph

paper · pdf · doi:10.1103/physrevc.80.044908

published as Phys.Rev.C80:044908,2009 · 10 pages, 9 figures

arxiv created 2009/09/08 · openalex publication_date 2009/10/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We examine the characteristic quantities of pion-emitting sources extracted by model-independent imaging analysis in relativistic heavy ion collisions. The moments of the spatial separation of pion pair emission can provide the characteristic information about the source geometry and coherence. They are better for describing the non-Gaussian sources with granular and core-halo structures. An improved granular source model of quark-gluon plasma droplets can reproduce the main characteristics of the two-pion correlation functions and source functions in the experiment of √s_NN=200 GeV Au+Au collisions. The transverse-momentum dependence of the normalized first-order moments of the separation for the granular source is consistent with that of the usual interferometry results of source radii, after taking into account the Lorentz contraction in the direction of the transverse momentum of the pion pair.

Citations

• Observing non-Gaussian sources in heavy-ion reactions
• Imaging of granular sources in high energy heavy ion collisions
• Extracting particle freeze-out phase-space densities and entropies from sources imaged in heavy-ion reactions
• Comparison of Source Images for Protons,π−’s, andΛ’s in6A GeVAu+AuCollisions
• Analyzing correlation functions with tesseral and Cartesian spherical harmonics