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arXiv 0704.3625hep-ph
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重离子碰撞经典模型中的初始场和不稳定性

Initial fields and instability in the classical model of the heavy-ion collision

Kenji Fukushima

摘要:

彩色玻璃凝聚体(CGC)提供了一个经典的描述,在高能量密集胶子物质。利用McLerran-Venugopalan(MV)模型计算了相对论核-核碰撞早期的初始能量密度ε(τ)。我们的解析公式再现了晶格离散模拟的定量结果,并得出RHIC能区Au-Au碰撞的ε(τ=0.1fm)=40- 50 GeV/fm^3的估计值。然后,我们制定不稳定性,违反了硬CGC背景固有的提升不变性的软波动。我们发现不稳定的模式产生的结果,系综平均在初始CGC领域。

英文摘要:

Color Glass Condensate (CGC) provides a classical description of dense gluon matter at high energies. Using the McLerran-Venugopalan (MV) model we calculate the initial energy density ε(τ) in the early stage of the relativistic nucleus-nucleus collision. Our analytical formula reproduces the quantitative results from lattice discretized simulations and leads to an estimate ε(τ=0.1fm)=40-50GeV/fm^3 in the Au-Au collision at RHIC energy. We then formulate instability with respect to soft fluctuations that violate boost invariance inherent to hard CGC backgrounds. We find unstable modes arising as a result of ensemble average over the initial CGC fields.

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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