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arXiv 0811.3363nucl-th
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相对论重离子碰撞中HBT之谜的解决

Resolving the HBT Puzzle in Relativistic Heavy Ion Collision

Scott Pratt

摘要:

相对论重离子对撞机的双粒子关联数据提供了描述π介子发射时空结构的详细飞秒信息。这些数据避免了用基于流体动力学的方法描述,与流体动力学在复制其他类别的可观测量方面的成功形成对比。这一失败激发了“HBT难题”一词的灵感,其中HBT指的是最初基于Hanbury-Brown Twiss干涉测量法的飞秒研究。在这里,这个难题被证明是源于流体动力学模型的一个单一的缺点,但几种效果的组合:主要包括预热化加速,使用更硬的状态方程,并添加粘性修正。

英文摘要:

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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