Particle Production in Strong Electromagnetic Fields in Relativistic Heavy-Ion Collisions
Particle Production in Strong Electromagnetic Fields in Relativistic Heavy-Ion Collisions
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DOI：
10.1155/2013/490495
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发表时间：
2013-01
影响因子：
1.7
通讯作者：
K. Tuchin
中科院分区：
文献类型：
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作者：
K. Tuchin
本文综述了重离子碰撞产生的电磁场的起源和性质。碰撞后的场强与碰撞能量成正比，在RHIC达到~，在LHC达到~。我证明了明确的分析计算后，下降了约1 - 2个数量级的等离子体膨胀期间的第一个FM/C，它冻结，并持续只要夸克胶子等离子体的生活作为一个有限的等离子体的电导率的结果。磁场在垂直于反应平面的方向上打破了球对称，因此所有动力学系数都是各向异性的。我检查QGP的粘度，并表明磁场诱导等离子体流的方位各向异性，即使在球对称几何。很强的电磁场对粒子产生有重要影响。我讨论了同步辐射引起的快费米子的能量损失和极化问题，考虑了磁场引起的光子衰变，通过洛伦兹电离机制阐明了解离，并研究了等离子体的电磁辐射。我的结论是，QGP中的所有过程都受到强电磁场的影响，并呼吁实验研究。
I review the origin and properties of electromagnetic fields produced in heavy-ion collisions. The field strength immediately after a collision is proportional to the collision energy and reaches ~ at RHIC and ~ at LHC. I demonstrate by explicit analytical calculation that after dropping by about one-two orders of magnitude during the first fm/c of plasma expansion, it freezes out and lasts for as long as quark-gluon plasma lives as a consequence of finite electrical conductivity of the plasma. Magnetic field breaks spherical symmetry in the direction perpendicular to the reaction plane, and therefore all kinetic coefficients are anisotropic. I examine viscosity of QGP and show that magnetic field induces azimuthal anisotropy on plasma flow even in spherically symmetric geometry. Very strong electromagnetic field has an important impact on particle production. I discuss the problem of energy loss and polarization of fast fermions due to synchrotron radiation, consider photon decay induced by magnetic field, elucidate dissociation via Lorentz ionization mechanism, and examine electromagnetic radiation by plasma. I conclude that all processes in QGP are affected by strong electromagnetic field and call for experimental investigation.