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arXiv 2307.09124hep-phnucl-th
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重夸克在 QGP 中通过软胶子辐射产生的辐射能量损失

Radiative energy loss of heavy quark through soft gluon emission in QGP

Taesoo Song, Ilia Grishmanovskii, Olga Soloveva, Elena Bratkovskaya

AI总结:

本文应用 Low 定理和 DQPM 研究重夸克在 QGP 中的软胶子辐射,实现振幅因子化并计算粲夸克截面及动量阻力、扩散输运系数。

摘要:

Low 定理被应用于夸克-胶子等离子体(QGP)中重夸克散射所引发的软胶子辐射。QGP 由动力学准粒子模型(DQPM)描述,该模型能够再现有限温度和化学势条件下来自 lQCD 的状态方程(EoS)。我们表明,如果辐射出的胶子是软的且具有长波长,则散射振幅可以分解为散射部分和辐射部分,并且 Slavnov-Taylor 恒等式在领头阶得到满足。通过对辐射胶子的能量施加适当的上限,我们得到了粲夸克的散射截面,以及在有和没有胶子辐射情况下 QGP 中的输运系数(动量阻力和扩散)。

英文摘要:

The Low's theorem is applied to the soft gluon emission from heavy quark scattering in quark-gluon plasma (QGP). The QGP is described by the dynamical quasi-particle model (DQPM) which reproduces the EoS from lQCD at finite temperature and chemical potential. We show that if the emitted gluon is soft and of long wavelength, the scattering amplitude can be factorized into the scattering part and the emission part and the Slavnov-Taylor identities are satisfied in the leading order. Imposing a proper upper limit on the emitted gluon energy, we obtain the scattering cross sections of charm quark as well as the transport coefficients (momentum drag and diffusion) in the QGP with and without gluon emission.

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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