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Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
Phys Rev Lett. 2007 Mar 30;98(13):132301. doi: 10.1103/PhysRevLett.98.132301. Epub 2007 Mar 26.
Emission source functions are extracted from correlation functions constructed from charged pions produced at midrapidity in Au+Au collisions at sqrt[s(NN)]=200 GeV. The source parameters extracted from these functions at low k(T) give first indications of a long tail for the pion emission source. The source extension cannot be explained solely by simple kinematic considerations. The possible role of a halo of secondary pions from resonance emissions is explored.
发射源函数是从在(\sqrt{s(NN)} = 200) GeV的金金碰撞中，在中快度产生的带电π介子构建的关联函数中提取出来的。在低(k(T))下从这些函数中提取的源参数首次表明了π介子发射源存在长尾巴。源的扩展不能仅通过简单的运动学考虑来解释。研究了来自共振发射的次级π介子晕的可能作用。
