Direct photons from relativistic heavy-ion collisions
Direct photons from relativistic heavy-ion collisions
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DOI：
10.1088/0954-3899/35/10/104026
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发表时间：
2008-05
期刊：
影响因子：
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通讯作者：
D. K. Srivastava
中科院分区：
文献类型：
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作者：
D. K. Srivastava
我们回顾了相对论重离子碰撞直接光子辐射研究的开创性进展，这有助于大大提高单光子作为夸克胶子等离子体探测器的范围。越来越多的证据表明，除了提供最初设想的等离子体初始温度的信息外，这些辐射还测量了退禁闭夸克和胶子的动量各向异性、夸克的能量损失、等离子体的初始空间不对称性以及系统的演化历史。在简要描述了SPS能量下直接光子的理论发展和结果之后，我们讨论了RHIC的期望和发现。
We recall the seminal developments in the study of radiation of direct photons from relativistic heavy ion collisions, which have helped to enhance the scope of single photons as a probe of the quark gluon plasma considerably. There is a mounting evidence that in addition to providing information about the initial temperature of the plasma as envisaged originally, these radiations measure the momentum anisotropy of the deconfined quarks and gluons, energy loss of the quarks, the initial spatial asymmetry of the plasma, and the history of evolution of the system. After a brief description of the theoretical developments and results for direct photons at SPS energies, we discuss the expectations and findings at RHIC.