论文标题
有限温度QCD with $ n_f = 2+1+1 $
Finite temperature QCD with $N_f=2+1+1$ Wilson twisted mass fermions at physical pion, strange and charm masses
论文作者
论文摘要
我们讨论了使用$ n_f = 2+1+1 $ Wilson扭曲的质量费米子在有限温度下研究量子染色体动力学方面的最新进展。 QCD对称性及其破裂和恢复的特别感兴趣。首先，我们在有限温度下讨论了$η'$梅森的行为，该温度紧密连接到轴向和手性对称性。结果表明，伪关键区域的$η'$质量略有减少，接近非反对贡献，并在较大温度下的增长。其次，我们介绍了$ n_f = 2+1+1 $ twisted Mass Wilson fermions的量子染色体动力学的晶格模拟的第一个结果，该量子模拟，奇怪和魅力质量。我们估计不同可观察物的手性伪临界温度。我们的初步结果与手性限制中的二阶过渡一致，但是其他情况并未排除。
We discuss recent progress in studying Quantum Chromodynamics at finite temperature using $N_f=2+1+1$ Wilson twisted mass fermions. Particular interest is in QCD symmetries and their breaking and restoration. First, we discuss the behaviour of the $η'$ meson at finite temperature, which is tightly connected to the axial and chiral symmetries. The results suggest a small decrease of the $η'$ mass in the pseudo-critical region coming close to the non-anomalous contribution and subsequent growth at large temperatures. Second, we present the first results of lattice simulations of Quantum Chromodynamics with $N_f=2+1+1$ twisted mass Wilson fermions at physical pion, strange and charm masses. We estimate the chiral pseudo-critical temperatures for different observables. Our preliminary results are consistent with a second order transition in the chiral limit, however other scenarios are not excluded.
