Resolving the HBT Puzzle in Relativistic Heavy Ion Collision

Details Resolving the HBT Puzzle in Relativistic Heavy Ion Collision Resolving the HBT Puzzle in Relativistic Heavy Ion Collision

2008-11-20

arxiv.org/abs/0811.3363v1

Phys.Rev.Lett.102:232301,2009

Physics

Nuclear Physics

Nuclear Theory

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.102.232301

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.

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