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pi Xi Correlations: Model Comparison and Xi *(1530) Puzzle

机译:皮 ξ correlations: model comparison and ξ *(1530) puzzle

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摘要

Predictions of hydrodynamics-parametrized statistical hadronization model HYDJET++ are compared to the STAR Collaboration preliminary pi Xi data. We demonstrate how decay of resonances and collective flow affect shift between the average freeze-out space-time points of Xi and pi . We study how different freeze-out scenarios: single freeze-out at Tth=Tch=0.165 GeV; thermal freeze-out at Tth=0.1 GeV; combined scenario when Xi and Xi *(1530) are emitted at chemical freeze-out while all other particles are emitted at the thermal freeze-out influence this shift. We study influence of the relative contribution of Xi from Xi *(1530) resonance decay on the pi Xi emission asymmetries. We show that the best description of mt-spectra and space-time differences is achieved within the combined scenario.
机译:将流体动力学参数化的统计强子化模型HYDJET ++的预测与STAR Collaboration的原始 pi Xi数据进行了比较。我们证明了共振衰减和集体流动如何影响 Xi和 pi的平均冻结时空点之间的偏移。我们研究了不同的冻结情况:Tth = Tch = 0.165 GeV的单个冻结;在Tth = 0.1 GeV时发生热冻结;当化学冻结时发出 Xi和 Xi *(1530),而在热冻结时发出所有其他粒子的组合方案会影响此偏移。我们研究了来自 Xi *(1530)共振衰减的 Xi相对贡献对 pi Xi发射不对称性的影响。我们表明,在组合方案中可以最好地描述mt-光谱和时空差异。

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