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首页> 外文期刊>The European Physical Journal, A. Hadrons and Nuclei >pp and ππ intensity interferometry in collisions of Ar+KCl at 1.76A GeV
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pp and ππ intensity interferometry in collisions of Ar+KCl at 1.76A GeV

机译：pp和ππ强度干涉法在1.76A GeV的Ar + KCl碰撞中

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摘要

Results on pp, π~+π~+, and π~?π~? intensity interferometry are reported for collisions of Ar+KCl at 1.76A GeV beam energy, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18/GSI. The experimental correlation functions as a function of the relative momentum are compared to model calculations allowing the determination of the space-time extent of the corresponding emission sources. The ππ source radii are found significantly larger than the pp emission radius. The present radii do well complement the beam-energy dependences of Gaussian source radii of the collision system of size A + A ? 40 + 40. The pp source radius at fixed beam energy is found to increase linearly with the cube root of the number of participants. From this trend, a lower limit of the pp correlation radius is deduced.
机译：在pp，π〜+π〜+和π〜？π〜？上的结果据报道，在SIS18 / GSI上用高接受双电子谱仪（HADES）研究了强度为1.76A GeV的Ar + KCl碰撞的强干涉法。将实验相关函数作为相对动量的函数与模型计算进行比较，从而可以确定相应排放源的时空范围。发现ππ源半径明显大于pp发射半径。当前半径很好地补充了大小为A + A？的碰撞系统的高斯源半径的束能量依赖性。 40 +40。发现固定束能量下的pp辐射源半径随参与者数量的立方根线性增加。从该趋势推论出pp相关半径的下限。

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