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arXiv 0912.0165hep-ph
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流不稳定性引起的夸克-胶子等离子体中喷流能量损失

Jet energy loss in the quark-gluon plasma by stream instabilities

Massimo Mannarelli, Cristina Manuel, Sergi Gonzalez-Solis, Michael Strickland

摘要:

本文研究了两股反向传播的粒子射流穿过热平衡非阿贝尔等离子体时引起的等离子体不稳定性的演化。为了简化分析,我们假设两个部分子喷流在坐标空间中可用均匀分布函数描述,在动量空间中可用高斯分布函数描述。我们发现,当粒子喷流穿过夸克-胶子等离子体时,激发出不稳定的色磁模和色电模。这些场与等离子体的粒子(或硬模)相互作用,诱导产生电流;因此,射流损失的能量被等离子体的规范场和硬模吸收。我们比较了数值模拟的结果与分析计算进行假设的粒子射流可以描述的海啸般的分布函数。我们发现定性和半定量的协议与这两种方法得到的结果。

英文摘要:

We study the evolution of the plasma instabilities induced by two jets of particles propagating in opposite directions and crossing a thermally equilibrated non-Abelian plasma. In order to simplify the analysis we assume that the two jets of partons can be described with uniform distribution functions in coordinate space and by Gaussian distribution functions in momentum space. We find that while crossing the quark-gluon plasma, the jets of particles excite unstable chromomagnetic and chromoelectric modes. These fields interact with the particles (or hard modes) of the plasma inducing the production of currents; thus, the energy lost by the jets is absorbed by both the gauge fields and the hard modes of the plasma. We compare the outcome of the numerical simulations with the analytical calculation performed assuming that the jets of particles can be described by a tsunami-like distribution function. We find qualitative and semi-quantitative agreement between the results obtained with the two methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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