论文标题
晶格模拟的有限化学势的QCD跨界
The QCD crossover at finite chemical potential from lattice simulations
论文作者
论文摘要
到目前为止，我们为QCD过渡线提供了最准确的结果。我们优化了跨界温度$ T_C $的定义，允许其非常确定的确定，并从虚构的化学势推断到真正的$μ_b\ \ 300 $ MEV。这项工作中采用的$ t_c $的定义是基于观察到的，即手性敏感性作为冷凝水的函数是零以零的通用曲线和Imaganiary $μ_b$。我们获得参数$κ__2= 0.0153（18）$和$κ__4= 0.00032（67）$作为基于$ n_t = 10,12 $的连续外推和$ 16 $ lattices，带有物理夸克质量。我们还推断了手性敏感性的峰值和沿交叉线的手性转变的宽度。实际上，这两者都与$μ_b$的恒定功能一致。我们认为在探索范围内没有关键的迹象。
We provide the most accurate results for the QCD transition line so far. We optimize the definition of the crossover temperature $T_c$, allowing for its very precise determination, and extrapolate from imaginary chemical potential up to real $μ_B \approx 300$ MeV. The definition of $T_c$ adopted in this work is based on the observation that the chiral susceptibility as a function of the condensate is an almost universal curve at zero and imaganiary $μ_B$. We obtain the parameters $κ_2=0.0153(18)$ and $κ_4=0.00032(67)$ as a continuum extrapolation based on $N_t=10,12$ and $16$ lattices with physical quark masses. We also extrapolate the peak value of the chiral susceptibility and the width of the chiral transition along the crossover line. In fact, both of these are consistent with a constant function of $μ_B$. We see no sign of criticality in the explored range.
