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arXiv 0907.4319hep-ph
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QGP中的非微扰重夸克相互作用

Nonperturbative Heavy-Quark Interactions in the QGP

R. Rapp, F. Riek, H. van Hees, V. Greco, M. Mannarelli

摘要:

采用$T$ -矩阵方法研究了夸克-胶子等离子体中的夸克偶素性质和重夸克输运。$T$ -矩阵方法非常适合于实现势散射,从而为重-重和重-轻夸克系统中的低动量转移相互作用提供了一个共同的框架。我们假设,在格点量子色动力学中计算的重夸克自由能可以估计潜在的势。我们讨论的限制,从真空光谱,不确定性所产生的潜在的不同的选择,和弹性和非弹性的宽度自然占在$T$矩阵形式主义的作用。

英文摘要:

We adopt a $T$-matrix approach to study quarkonium properties and heavy-quark transport in a Quark-Gluon Plasma. The $T$-matrix approach is well suited to implement potential scattering and thus provides a common framework for low-momentum transfer interactions in heavy-heavy and heavy-light quark systems. We assume that the underlying potentials can be estimated from the heavy-quark free energy computed in lattice QCD. We discuss constraints from vacuum spectroscopy, uncertainties arising from different choices of the potential, and the role of elastic and inelastic widths which are naturally accounted for in the $T$-matrix formalism.

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