skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Non-Identical Particle Femtoscopy in Heavy-Ion Collisions

Abstract

Non-identical particle correlations have been used to study the properties of the source emitting particles in heavy-ion collisions. In this work the status of non-identical particle correlations technique and latest results from ultra-relativistic heavy-ion collision experiments are discussed. Some specific features of the Coulomb interaction, important for the asymmetry analysis, are discussed.

Authors:
 [1]
  1. Wydzial Fizyki, Politechnika Warszawska, ul. Koszykowa 75, 00-662 Warsaw (Poland)
Publication Date:
OSTI Identifier:
20800144
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 828; Journal Issue: 1; Conference: 35. internationals symposium on multiparticle dynamics; Workshop on particle correlations and femtoscopy, Kromeriz (Czech Republic), 9-17 Aug 2005; Other Information: DOI: 10.1063/1.2197476; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; CORRELATIONS; COULOMB FIELD; HEAVY ION REACTIONS; MULTIPLE PRODUCTION; PARTICLE INTERACTIONS; RELATIVISTIC RANGE; STATISTICAL MODELS

Citation Formats

Kisiel, Adam. Non-Identical Particle Femtoscopy in Heavy-Ion Collisions. United States: N. p., 2006. Web. doi:10.1063/1.2197476.
Kisiel, Adam. Non-Identical Particle Femtoscopy in Heavy-Ion Collisions. United States. doi:10.1063/1.2197476.
Kisiel, Adam. Tue . "Non-Identical Particle Femtoscopy in Heavy-Ion Collisions". United States. doi:10.1063/1.2197476.
@article{osti_20800144,
title = {Non-Identical Particle Femtoscopy in Heavy-Ion Collisions},
author = {Kisiel, Adam},
abstractNote = {Non-identical particle correlations have been used to study the properties of the source emitting particles in heavy-ion collisions. In this work the status of non-identical particle correlations technique and latest results from ultra-relativistic heavy-ion collision experiments are discussed. Some specific features of the Coulomb interaction, important for the asymmetry analysis, are discussed.},
doi = {10.1063/1.2197476},
journal = {AIP Conference Proceedings},
number = 1,
volume = 828,
place = {United States},
year = {Tue Apr 11 00:00:00 EDT 2006},
month = {Tue Apr 11 00:00:00 EDT 2006}
}
  • Analyses of two-particle correlations have provided the chief means for determining spatio-temporal characteristics of relativistic heavy ion collisions. We discuss the theoretical formalism behind these studies and the experimental methods used in carrying them out. Recent results from RHIC are put into context in a systematic review of correlation measurements performed over the past two decades. The current understanding of these results are discussed in terms of model comparisons and overall trends.
  • I present a brief overview of the wealth of femtoscopic measurements from the past two decades of heavy ion experiments. Essentially every conceivable 'knob' at our disposal has been turned; the response of two-particle correlations to these variations has revealed much about the space-momentum substructure of the hot source created in the collisions. I discuss the present status of the femtoscopic program and questions which remain, and point to new efforts which aim to resolve them.
  • By using a viscous hydrodynamic model coupled to a hadronic cascade code, numerous features of the dynamics and equilibrium properties are explored for their impact on femtoscopic measurements. The equation of state, viscous parameters, and initial conditions are investigated. We find that femtoscopy is affected by numerous model features at the 10% level and that by including features and adjusting unknown parameters, one can explain experimental source size measurements to better than 10%.
  • No abstract prepared.
  • Azimuthally sensitive femtoscopy for heavy-ion collisions at the Relativistic Heavy Ion Collider (RHIC) and Large Hadron Collider (LHC) is explored within the approach consisting of the hydrodynamics of perfect fluid followed by statistical hadronization. It is found that for the RHIC initial conditions, employing the Gaussian shape of the initial energy density, the very same framework that reproduces the standard soft observables [including the transverse-momentum spectra, the elliptic flow, and the azimuthally averaged Hanbury-Brown-Twiss (HBT) radii] leads to a proper description of the azimuthally sensitive femtoscopic observables; we find that the azimuthal variation of the side and out HBT radiimore » as well as out-side cross term are very well reproduced for all centralities. Concerning the dependence of the femtoscopic parameters on k{sub T} we find that it is very well reproduced. The model is then extrapolated to the LHC energy. We predict the overall moderate growth of the HBT radii and the decrease of their azimuthal oscillations. Such effects are naturally caused by longer evolution times. In addition, we discuss in detail the space-time patterns of particle emission. We show that they are quite complex and argue that the overall shape seen by the femtoscopic methods cannot be easily disentangled on the basis of simple-minded arguments.« less