Synchrotron radiation by fast fermions in heavy-ion collisions
Synchrotron radiation by fast fermions in heavy-ion collisions
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DOI：
10.1103/physrevc.82.034904
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发表时间：
2010-06
影响因子：
3.1
通讯作者：
K. Tuchin
中科院分区：
文献类型：
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作者：
K. Tuchin
研究了相对论重离子碰撞产生的强磁场中快夸克对胶子的同步辐射。我们认为，由于等离子体的高电导率，在整个等离子体寿命中，磁场几乎是恒定的。我们计算了快夸克同步辐射胶子的能量损失。我们发现，在大型强子对撞机上，一个轻夸克的单位长度的典型能量损失是几个GeV/Fm。仅这一效应就预示着p{次垂直}高达约20GeV的喷流猝灭。我们还发现，伴随着同步辐射的自旋翻转跃迁效应导致夸克和轻子相对于磁场方向的强烈极化。对轻子极化的观测可能提供重离子碰撞中存在强磁场的直接证据。
We study the synchrotron radiation of gluons by fast quarks in strong magnetic field produced by colliding relativistic heavy ions. We argue that due to high electric conductivity of plasma, the magnetic field is almost constant during the entire plasma lifetime. We calculate the energy loss due to synchrotron radiation of gluons by fast quarks. We find that the typical energy loss per unit length for a light quark at the Large Hadron Collider is a few GeV per fm. This effect alone predicts quenching of jets with p{sub perpendicular} up to about 20 GeV. We also show that the spin-flip transition effect accompanying the synchrotron radiation leads to a strong polarization of quarks and leptons with respect to the direction of the magnetic field. Observation of the lepton polarization may provide a direct evidence of existence of strong magnetic field in heavy-ion collisions.