论文标题
在低温下，QCD的热力学和夸克冷凝水
Thermodynamics and quark condensates of three-flavor QCD at low temperature
论文作者
论文摘要
我们使用三种培养的手性扰动理论（$χ$ pt）来计算有限温度下的QCD的压力，光和$ s $ QUARK冷凝物在低功能膨胀中以$ {\ cal o}（p^6）$。我们还包括电磁效果以订购$ e^2 $，其中电磁耦合$ e $将$ e $计数为订单$ p $。我们对压力和冷凝水的结果表明，$χ$ pt在高达约150 meV的温度方面很好地收敛。我们结合了$χ$ PT和强子共振气体（HRG）型号，通过添加较重的重子和介子。将我们的结果与晶格模拟和d比较，该协议对于低于{170} MEV的温度非常好，与$χ$ pt的结果相比之下，$χ$ pt的结果与晶格仅一致，最高可达$ t \ of $ t \ of120 $ mev。我们对手性跨界温度的价值是160.1 MEV，比较略有优惠，与$ 157.3 $ MEV的晶格结果相比。
We use three-flavor chiral perturbation theory ($χ$PT) to calculate the pressure, light and $s$-quark condensates of QCD in the confined phase at finite temperature to ${\cal O}(p^6)$ in the low-energy expansion. We also include electromagnetic effects to order $e^2$, where the electromagnetic coupling $e$ counts as order $p$. Our results for the pressure and the condensates suggest that $χ$PT converges very well for temperatures up to approximately 150 MeV. We combine $χ$PT and the Hadron Resonance Gas (HRG) model by adding heavier baryons and mesons. Our results are compared with lattice simulations an d the agreement is very good for temperatures below {170} MeV, in contrast to the results from $χ$PT which agree with the lattice only up to $T\approx120$ MeV. Our value for the chiral crossover temperature is 160.1 MeV, which compares favorably to the lattice result of $157.3$ MeV.
