Bass Steffen A, Müller Berndt, Srivastava Dinesh K
Department of Physics, Duke University, Durham, North Carolina 27708-0305, USA.
Phys Rev Lett. 2004 Oct 15;93(16):162301. doi: 10.1103/PhysRevLett.93.162301. Epub 2004 Oct 13.
We calculate the two-body correlation function of direct photons produced in central Au+Au collisions at the Relativistic Heavy-Ion Collider. Our calculation includes contributions from the early preequilibrium phase in which photons are produced via hard parton scatterings as well as radiation of photons from a thermalized quark-gluon plasma and the subsequent expanding hadron gas. We find that high energy photon interferometry provides a faithful probe of the details of the space-time evolution and of the early reaction stages of the system.
我们计算了相对论重离子对撞机中中心金离子与金离子碰撞产生的直接光子的两体关联函数。我们的计算包括早期预平衡阶段的贡献，在这个阶段光子通过硬部分子散射产生，以及来自热化夸克-胶子等离子体的光子辐射和随后膨胀的强子气体。我们发现，高能光子干涉测量法为系统时空演化的细节以及早期反应阶段提供了可靠的探测手段。
