简化热强耦合规范理论中的喷注淬熄
Jet quenching in hot strongly coupled gauge theories simplified
摘要：
强耦合类QCD等离子体中喷流停止的理论研究已经使用规范-引力对偶性发现，对于大的喷流能量E，最大停止距离的尺度类似于E^{1/3}。在最近研究由规范理论中的有限尺寸源产生的喷流的工作中，我们发现了一个额外的尺度：典型的（与最大相反的）喷流停止距离尺度，如（EL）^{1/4}，其中L是喷流产生的时空区域的大小。在本文中，我们表明，我们以前的结果，有点涉及计算的引力对偶，特别是（EL）^{1/4}规模，可以很容易地复制和理解的距离，高能粒子在AdS_5-Schwarzschild空间旅行之前，落入黑膜。我们还研究了如何停止距离取决于用于创建射流的源操作符的共形尺寸。
英文摘要：
Theoretical studies of jet stopping in strongly-coupled QCD-like plasmas have used gauge-gravity duality to find that the maximum stopping distance scales like E^{1/3} for large jet energies E. In recent work studying jets that are created by finite-size sources in the gauge theory, we found an additional scale: the typical (as opposed to maximum) jet stopping distance scales like (EL)^{1/4}, where L is the size of the space-time region where the jet is created. In this paper, we show that the results of our previous, somewhat involved computation in the gravity dual, and the (EL)^{1/4} scale in particular, can be very easily reproduced and understood in terms of the distance that high-energy particles travel in AdS_5-Schwarzschild space before falling into the black brane. We also investigate how stopping distances depend on the conformal dimension of the source operator used to create the jet.
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