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arXiv 0809.1445nucl-ex
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Sqrts_NN=17.3 GeV Pb+Pb碰撞的三维二π介子源图像:源破裂动力学的新约束

Three-Dimensional two-pion source image from Pb+Pb Collisions at Sqrts_NN=17.3 GeV: New constraints for source breakup dynamics

C. Alt

摘要:

利用源成像方法,给出了$\sqrt s_{NN}$ =17.3 GeV中心($0-7%$)Pb+Pb碰撞中,$p_T<70$ MeV/c的中快度π介子对的三维2 π源函数.在π介子对的横向动量(向外)和光束(纵向)方向上观察到显著的非高斯尾。模型计算再现他们与假设的Bjorken纵向助推不变性和横向流动的冲击波动力学加上“外-内燃烧”在横向方向上,他们也产生一个适当的时间分裂和排放持续时间的π源。

英文摘要:

Source imaging methodology is used to provide a three-dimensional two-pion source function for mid-rapidity pion pairs with $p_T<70$ MeV/c in central ($0-7%$) Pb+Pb collisions at $\sqrt s_{NN}$=17.3 GeV. Prominent non-Gaussian tails are observed in the pion pair transverse momentum (outward) and in the beam (longitudinal) directions. Model calculations reproduce them with the assumption of Bjorken longitudinal boost invariance and transverse flow blast-wave dynamics coupled with "outside-in burning" in the transverse direction; they also yield a proper time for breakup and emission duration for the pion source.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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