论文标题
AU + AU中的两杆强度干涉法 @ 1.23 $ A $ GEV
Two-Pion Intensity Interferometry in Au + Au @ 1.23$A$ GeV
论文作者
论文摘要
提出了高统计$π^{ - }π^{ - } $ hbt数据，用于非中央Au + au碰撞，在1.23 $ a $ a $ gev，用sis18/gsi的hades测量。研究了三维发射源，以依赖于横向动量和中心性。观察到源相对于梁轴的倾斜。源源的空间延伸和倾斜幅度随横向动量而降低。空间延伸降低，倾斜幅度从中央碰撞到周围碰撞。垂直于光束轴的偏心率良好地符合高横向动量处的初始核次重叠区域。
High-statistics $π^{-}π^{-}$ 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 centrality. A tilt of the source relative to the beam axis is observed. The spatial extension and the tilt magnitude of the source decrease with transverse momentum. The spatial extension decreases and the tilt magnitude increases going from central to peripheral collisions. The derived eccentricity perpendicular to the beam axis fits well to the initial nucleonic overlap region at high transverse momentum.
