解开非微扰重夸克势背后的时标
Disentangling the timescales behind the non-perturbative heavy quark potential
摘要：
重夸克势的静态部分与矩形威尔逊圈的谱密切相关。特别是最低的正频率峰编码的两体系统的后期时间演化，其特征在于由一个复杂的潜力。虽然最初的研究假设了一个完美的分离早期和晚期的时间物理，一个简单的洛伦兹（布赖特-维格纳）形状足以描述的光谱峰，我们认为，规模去耦一般是不完整的。因此，早期的时间，即非潜在的影响，显着修改最低峰的形状。我们得出一般的理由，反映了这一事实的改进的峰值分布。应用改进的非微扰格点量子色动力学光谱拟合，现在产生一个潜在的，是兼容的过渡到一个去限制屏蔽等离子体。
英文摘要：
The static part of the heavy quark potential has been shown to be closely related to the spectrum of the rectangular Wilson loop. In particular the lowest lying positive frequency peak encodes the late time evolution of the two-body system, characterized by a complex potential. While initial studies assumed a perfect separation of early and late time physics, where a simple Lorentian (Breit-Wigner) shape suffices to describe the spectral peak, we argue that scale decoupling in general is not complete. Thus early time, i.e. non-potential effects, significantly modify the shape of the lowest peak. We derive on general grounds an improved peak distribution that reflects this fact. Application of the improved fit to non-perturbative lattice QCD spectra now yields a potential that is compatible with a transition to a deconfined screening plasma.
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