论文标题
追踪异常作为中子星形的保征的签名
Trace anomaly as signature of conformality in neutron stars
论文作者
论文摘要
我们讨论一种解释，即观察数据所建议的中子恒星物质中声速的峰值表示强烈耦合的保形物质。归一化的痕量异常是无限制的保质度量，导致导数和对声速的非衍生作用。我们发现，声速度中的峰归因于痕量异常的衍生贡献，该导数陡峭地接近保形极限。对高密度QCD行为的平稳连续性意味着痕量异常的物质部分可能是正定的。我们讨论了痕量异常在中子星的$ m $ - $ r $关系上的阳性状况的可能含义。
We discuss an interpretation that a peak in the sound velocity in neutron star matter, as suggested by the observational data, signifies strongly-coupled conformal matter. The normalized trace anomaly is a dimensionless measure of conformality leading to the derivative and the non-derivative contributions to the sound velocity. We find that the peak in the sound velocity is attributed to the derivative contribution from the trace anomaly that steeply approaches the conformal limit. Smooth continuity to the behavior of high-density QCD implies that the matter part of the trace anomaly may be positive definite. We discuss a possible implication of the positivity condition of the trace anomaly on the $M$-$R$ relation of the neutron stars.
