Abstract

High-statistics \({{\pi }^{ - }}{{\pi }^{ - }}\) and \({{\pi }^{ + }}{{\pi }^{ + }}\) HBT data for non-central Au + Au collisions at 1.23 A GeV, measured with HADES at SIS18/GSI, are presented. The three-dimensional emission source is studied in dependence on pair transverse momentum and beam energy. A tilt of the source with respect to the reaction plane is observed. The spatial extension and the tilt magnitude of the source decrease with transverse momentum. A clear charge-sign difference is observed for the spatio-temporal variances, but not for the tilt angle of the source. Derived geometrical and temporal parameters do well complement the trend over several orders of magnitude in beam-energy provided that consistent transverse momenta are selected.

中文翻译：

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Au + Au在1.23 A GeV的非中心碰撞中的两点强度干涉法

摘要

高统计量\（{{\ pi} ^ {-}} {{\ pi} ^ {-}} \）和\（{{\ pi} ^ {+}} {{\ pi} ^ {+}} \）提供了在SIS18 / GSI上用HADES测量的，在1.23 A GeV处非中心Au + Au碰撞的HBT数据。依赖于成对的横向动量和束能量研究三维发射源。观察到源相对于反应平面的倾斜。源的空间扩展和倾斜幅度随横向动量而减小。对于时空变化观察到明显的电荷符号差异，但对于源的倾斜角则观察不到。如果选择一致的横向动量，则导出的几何和时间参数可以很好地补充光束能量几个数量级上的趋势。