Conformal anomaly as a source of soft photons in heavy ion collisions.
Conformal anomaly as a source of soft photons in heavy ion collisions.
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DOI：
10.1103/physrevlett.109.202303
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发表时间：
2012-06
影响因子：
8.6
通讯作者：
G. Basar;D. Kharzeev;V. Skokov
中科院分区：
文献类型：
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作者：
G. Basar;D. Kharzeev;V. Skokov
我们引入了一种新颖的光子产生机制，该机制源于 QCD×QED 的共形异常和重离子碰撞中强（电）磁场的存在。使用 QCD 等离子体体模式的流体动力学描述，我们表明这种机制导致的光子产量与传统来源的产量相当。该机制还对光子的方位各向异性 v(2) 以及径向“流”做出了显着的积极贡献。我们将我们的结果与 PHENIX Collaboration 的数据进行比较。
We introduce a novel photon production mechanism stemming from the conformal anomaly of QCD×QED and the existence of strong (electro)magnetic fields in heavy ion collisions. Using the hydrodynamical description of the bulk modes of QCD plasma, we show that this mechanism leads to the photon production yield that is comparable to the yield from conventional sources. This mechanism also provides a significant positive contribution to the azimuthal anisotropy of photons, v(2), as well as to the radial "flow." We compare our results to the data from the PHENIX Collaboration.