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首页> 外文期刊>Physical review, C >Transport coefficients for the hot quark-gluon plasma at finite chemical potential mu(B)
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Transport coefficients for the hot quark-gluon plasma at finite chemical potential mu(B)

机译：有限化学潜在亩的热夸克 - 胶质等离子体的运输系数（b）

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摘要

We calculate transport coefficients of the quark-gluon plasma (QGP) within the dynamical quasiparticle model (DQPM) by explicitly computing the parton interaction rates as a function of temperature T and baryon chemical potential mu(B) on the basis of the DQPM couplings and partonic propagators. The latter are extracted from lattice QCD by matching the equation of state, entropy density and energy density at mu(B) = 0. For baryon chemical potentials 0 <= mu(B) <= 500 MeV we employ a scaling ansatz for the effective coupling which was shown before to lead to thermodynamic consistent results in this range. We compute the ratio of the shear and bulk viscosities to the entropy density, i.e., eta/s and zeta/s, the electric conductivity sigma(0)/T, as well as the baryon diffusion coefficient kappa(B) and compare to related approaches from the literature. We find that the ratios eta/s and zeta/s as well as sigma(0)/T are in accord with the results from lattice QCD at mu(B) = 0 and only weakly depend on the ratio T/T-c(mu(B)) where T-c(mu(B)) denotes the critical temperature at finite baryon chemical potential.
机译：通过在DQPM联轴器的基础上明确计算PATON交互速率作为温度T和BARYON COMPORY MU（B）的函数，计算动态Quaparticle模型（DQPM）内的Quark-gluon等离子体（QGP）的传输系数。局部传播者。通过匹配状态，熵密度和在μm（b）= 0的方程，从晶格qcd从晶格QCd中提取后者。对于Baryon化学电位0 <= mu（b）<= 500 mev，我们采用缩放ansatz以实现有效在此范围内导致热力学的耦合导致热力学一致。我们计算剪切和堆积粘度与熵密度的比率，即ETA / S和Zeta / s，导电σ（0）/ t以及Baryon扩散系数Kappa（B）并与相关的相比文学方法。我们发现Ratios ETA / s和Zeta / s以及Sigma（0）/ t符合Mu（b）= 0的晶格qcd的结果，只能缺点t / tc（mu（ b））其中Tc（mu（b））表示有限肌肉化学电位的临界温度。

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