Resolving the HBT Puzzle in Relativistic Heavy Ion Collision

Abstract

Two particle correlation data from the Relativistic Heavy Ion Collider have provided detailed femtoscopic information describing the space-time structure of the emission of pions. This data had avoided description with hydrodynamic-based approaches, in contrast to the success of hydrodynamics in reproducing other classes of observables. This failure has inspired the term ``HBT puzzle'', where HBT refers to femtoscopic studies which were originally based on Hanbury-Brown Twiss interferometry. Here, the puzzle is shown to originate not from a single shortcoming of hydrodynamic models, but the combination of several effects: mainly including pre-thermalized acceleration, using a stiffer equation of state, and adding viscous corrections.

4 pages, 2 figures

References in corpus (7)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
• The centrality dependence of elliptic flow, the hydrodynamic limit, and the viscosity of hot QCD
• Cosmic Calibration: Constraints from the Matter Power Spectrum and the Cosmic Microwave Background
• Initial condition for hydrodynamics, partonic free streaming, and the uniform description of soft observables at RHIC
• A Co-moving Coordinate System for Relativistic Hydrodynamics
• Transport model study of the $m_T$-scaling for $\Lambda$, K, and $\pi$ HBT-correlations

Cited by in corpus (5)

• Equation of state and QCD transition at finite temperature
• Free-streaming approximation in early dynamics of relativistic heavy-ion collisions
• Relativistic Heavy Ion Collisions: Viscous Hydrodynamic Simulations and Final State Interactions
• Consistent hydrodynamic description of one- and two-particle observables in relativistic heavy-ion collisions at RHIC
• Test of Bowler-Sinyukov Treatment of Coulomb Interaction