重离子碰撞的AdS/CFT引力对偶模型的约束条件
Constraints on AdS/CFT Gravity Dual Models of Heavy Ion Collisions
摘要：
结果表明：（1）在200 AGeV的Au+Au中心碰撞中，通过非光子电子$R_{AA}^e(p_T \sim 6 {\rm GeV})$测量到的重夸克喷注的核修正，（2）低横动量π介子的“完美流体”椭圆横向流，$v_2(p_T\sim 1 {\rm GeV})$在非中心碰撞中的报道，（3）π介子的整体快度密度$dN_π/dy$，（4）强耦合夸克-胶子等离子体（sQGP）的格点QCD熵密度亏损$S/S_{SB}$和（5）一个因果条件在一类sQGP动力学的规范/弦引力对偶模型中解析关联。当t 'Hooft和Gauss-Bonnet耦合参数在$λ\approx 10-25$和$0< λ_{GB}< 0.09$范围内时，现有的RHIC/BNL和格点QCD数据与这些模型非常一致。此外，所观察到的五重相关性似乎有利于彩色玻璃冷凝液在当前系统误差内的Glauber初始条件。
英文摘要：
We show that the five-fold constraints due to (1) the observed nuclear modification of heavy quark jets measured via non-photonic electrons $R_{AA}^e(p_T \sim 6 {\rm GeV})$ in central Au+Au collisions at 200 AGeV, (2) the "perfect fluid' elliptic transverse flow of low transverse momenta pions, $v_2(p_T\sim 1 {\rm GeV})$ reported for noncentral collisions, (3) the global pion rapidity density $dN_π/dy$, (4) the lattice QCD entropy density deficiency, $S/S_{SB}$, of strongly coupled Quark-Gluon Plasmas (sQGP), and (5) a causal requirement are analytically correlated in a class of gauge/string gravity dual models of sQGP dynamics. Current RHIC/BNL and lattice QCD data are found to be remarkably compatible with these models if the t'Hooft and Gauss-Bonnet coupling parameters lie in the range $λ\approx 10-25$ and $0< λ_{GB}< 0.09$. In addition, the observed five-fold correlation appears to favor color glass condensate over Glauber initial conditions within current systematic errors.
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