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arXiv 0806.3341hep-phnucl-exnucl-th
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sQGP中的重口味

Heavy Flavor in the sQGP

R. Rapp, D. Cabrera, V. Greco, M. Mannarelli, H. van Hees

摘要:

本文试图统一处理夸克-胶子等离子体中的重夸克偶素和重夸克扩散。我们的方法是基于有限温度T-矩阵的相互作用势估计的重夸克内能计算的热格点量子色动力学(lQCD)。在粲偶素扇形中,S波束缚态(J/π,η_c)在~2 T_c的温度下仍然存在,这与lQCD中欧氏关联函数的约束并不矛盾。在开重味区,T-矩阵相互作用大大降低了重夸克的扩散,导致了与RHIC单电子谱的一致性,并暗示了在T_c附近有一个小的粘熵比。

英文摘要:

We attempt a unified treatment of heavy quarkonia and heavy-quark diffusion in the Quark-Gluon Plasma. Our approach is based on finite-temperature T-matrices with interaction potentials estimated from the heavy-quark internal energy computed in thermal lattice QCD (lQCD). In the charmonium sector S-wave bound states (J/ψ, η_c) survive up to temperatures of ~2 T_c, not inconsistent with constraints from euclidean correlation functions in lQCD. In the open-heavy flavor sector, the T-matrix interaction reduces heavy-quark diffusion substantially, leading to fair agreement with single-electron spectra at RHIC and suggestive for a small viscosity-to-entropy ratio close to T_c.

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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