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首页> 外文期刊>Physical review, D >In-medium effect on the thermodynamics and transport coefficients in the van der Waals hadron resonance gas
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In-medium effect on the thermodynamics and transport coefficients in the van der Waals hadron resonance gas

机译：对van der Waals的热力学和运输系数的中等效果，强子共振气体

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摘要

An extension of the van der Waals hadron resonance gas (VDWHRG) model which includes the in-medium thermal modification of hadron masses, the thermal VDWHRG (TVDWHRG) model, is considered in this paper. Based on the 2 + 1 flavor Polyakov linear sigma model (PLSM) and the scaling mass rule of hadrons, we obtain the temperature behavior of all hadron masses for different fixed baryon chemical potentials μ B . We calculate various thermodynamic observables at μ B = 0 ? ? GeV in the TVDWHRG model. An improved agreement with the lattice data from the TVDWHRG model in the crossover region ( T ～ 0.16 – 0.19 ? ? GeV ) is observed as compared to those from the VDWHRG and ideal HRG (IHRG) models. We further discuss the effects of the in-medium modification of hadron masses and VDW interactions between (anti)baryons on the dimensionless transport coefficients, such as the shear viscosity to entropy density ratio ( η / s ) and scaled thermal ( λ / T 2 ) and electrical ( σ el / T ) conductivities in the IHRG model at different μ B by utilizing quasiparticle kinetic theory with relaxation time approximation. We find in contrast to the IHRG model, the TVDWHRG model leads to a qualitatively and quantitatively different behavior of transport coefficients with T and μ B .
机译：在本文中考虑了包括高强子质量的中式热改装的van der WaaLs强子谐振气体（Vdwhrg）模型。基于2 + 1味的Polyakov线性Sigma模型（PLSM）和强调的缩放大规模规则，我们获得不同固定的Baryon化学电位μB的所有强子质量的温度行为。我们在μb= 0时计算各种热力学可观察到？还GEV在TVDWHRG模型中。与来自来自VDWHRG和理想的HRG（IHRG）模型相比，观察到来自交叉区域中的TVDWHRG模型的晶格数据的改进协议。我们进一步探讨了培养基中介质改性的培养基群和VDW相互作用在无量纲输送系数上（例如剪切粘度与熵密度比（η/ s）和缩放的热（λ/ t 2通过利用Quasiparticle动力学理论，利用Quasiparticle动力学近似，在不同μb处的IHRG模型中的电气（σEL/ T）电导率。我们发现与IHRG模型相比，TVDWHRG模型导致与T和μB的传输系数的定性和定量不同的行为。

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