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arXiv 2212.09043hep-lathep-phnucl-th
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(2+1)味QCD在非零净重子数密度的奇异中性物质中的状态方程与声速

Equation of state and speed of sound of (2+1)-flavor QCD in strangeness-neutral matter at non-vanishing net baryon-number density

D. Bollweg, D. A. Clarke, J. Goswami, O. Kaczmarek, F. Karsch, Swagato Mukherjee, P. Petreczky, C. Schmidt, Sipaz Sharma

AI总结:

本文利用八阶泰勒级数和Padé近似更新了非零化学势下(2+1)味QCD的状态方程,计算了奇异中性物质的体热力学量、声速及绝热压缩因子,并证明四阶泰勒级数即可在RHIC对撞机束流能量扫描的温度范围内很好地描述该状态方程。

摘要:

我们更新了基于八阶泰勒级数得到的非零守恒荷化学势下(2+1)味QCD的状态方程结果。我们给出了奇异中性强相互作用物质的基本体热力学观测量结果,即压强、数密度、能量和熵密度,并使用Padé近似重求和泰勒级数结果。此外,我们在恒定每净重子数熵线上计算了声速以及奇异中性物质的绝热压缩因子。我们表明,在相对论重离子对撞机对撞模式下的束流能量扫描可达到的几乎整个温度范围内,状态方程(P(n_B), ε(n_B))已能由四阶泰勒级数很好地描述。

英文摘要:

We update results on the QCD equation of state in (2+1)-flavor QCD with non-zero conserved charge chemical potentials obtained from an eighth-order Taylor series. We present results for basic bulk thermodynamic observables of strangeness-neutral strong-interaction matter, i.e. pressure, number densities, energy and entropy density, and resum Taylor series results using Padé approximants. Furthermore, we calculate the speed of sound as well as the adiabatic compression factor of strangeness-neutral matter on lines of constant entropy per net baryon number. We show that the equation of state ($P(n_B), ε(n_B)$) is already well described by the $4^{\rm th}$-order Taylor series in almost the entire range of temperatures accessible with the beam energy scan in collider mode at the Relativistic Heavy Ion Collider.

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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