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arXiv 0811.1058hep-phnucl-th
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热夸克-胶子等离子体中重介子的离解

On dissociation of heavy mesons in a hot quark-gluon plasma

Fabio Dominguez, Bin Wu

摘要:

本文比较了无限大夸克-胶子等离子体中重介子离解的两种机制:动态德拜屏蔽和多重散射。利用类薛定谔方程的不确定原理,我们发现,对于大小为a_B的快速运动重介子的动力学德拜屏蔽离解和介质中静止介子的离解,a_B \simeq 1/μ \simeq 1/(α_{eff}^{1/2}T)与α_{eff} \equiv α(N_c+{N_f \over 2})的判据都是参数成立的.与此相反,我们发现重介子由于非关联多重散射而离解的判据是参数化的1/a_B \simeq [γα_{eff} \ln{1/α_{eff}} ]^{1/3}T.因此,多重散射是无限热等离子体中重介子离解的一种更有效的机制。

英文摘要:

We compare two mechanisms for the dissociation of heavy mesons in an infinite quark-gluon plasma: dynamic Debye screening and multiple scattering. Using the uncertainty principle inspired by a Schrodinger-like equation, we find that the criterion a_B\simeq1/μ\simeq 1/(α_{eff}^{1/2}T) with α_{eff}\equivα(N_c+{N_f\over2}) is parametrically true both for the dissociation of fast moving heavy mesons with a size a_B due to dynamic Debye screening as well as for mesons at rest in the medium. In contrast, we find that the criterion for the dissociation of heavy mesons due to uncorrelated multiple scattering is parametrically 1/a_B \simeq [γα_{eff}\ln{1/α_{eff}}]^{1/3}T. Therefore, multiple scattering is a more efficient mechanism for the dissociation of heavy mesons in an infinite hot plasma.

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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