论文标题
手性QCD QCD的一阶阶段过渡与$ \ Mathcal {p} $和$ \ Mathcal {cp} $违规的重力波和原始黑洞不平衡的一阶相变
Gravitational waves and primordial black holes from chirality imbalanced QCD first-order phase transition with $\mathcal {P}$ and $\mathcal {CP}$ violation
论文作者
论文摘要
QCD中的手性不平衡是由从手性相变高的高温下的intsanton抗内斯坦顿配对的排斥轴向矢量相互作用自发诱导的，在低温下消失了。手性化学势$μ_5$的大小与Sphaleron过渡相同。手性不平衡的阶段过渡始终是早期宇宙中的一阶，$ \ MATHCAL {P} $和$ \ MATHCAL {CP} $违规。在这项工作中研究了重力波的光谱和从该一阶相变的原始黑洞的形成，还分析了强磁场的效果。手性不平衡产生的引力波可以通过Lisa，Taiji和Decigo检测到，峰值能量密度位于$ 10^{ - 11} $至$ 10^{ - 9} $的范围内，以及位于$ 10^{ - 5} $ Hz $ hz至$ 10^$ 10^$ 10^^$ hz的峰值频率。具有较大轴向矢量耦合强度和较强磁场的光谱具有较高的峰值能量密度和较低的峰值频率。根据这一趋势，SKA，IPTA和EPTA也可以检测到引力波光谱。从弹跳解决方案计算出的相变反持续时间$β/h _*$的订单为$ 10^4 $，比electroweak相转换的典型值$ 10-100 $高。基于假真空衰减的推迟机制，发现原始黑洞的形成不受青睐，因为相变的$β/h _*$，因此相转换在极端的时间内完成，因此较大的值迅速衰减。
The chirality imbalance in QCD is spontaneously induced by a repulsive axial-vector interaction from the instanton anti-instanton pairing at high temperature above the chiral phase transition, and vanishes at low temperature. The chiral chemical potential $μ_5$ is in the same magnitude as estimated from the sphaleron transition. Phase transition of the chirality imbalance is always a first-order one in the early universe with $\mathcal {P}$ and $\mathcal {CP}$ violation. The spectra of gravitational waves and the formation of the primordial black holes from this first-order phase transition is investigated in this work, and the effect of a strong magnetic field is also analyzed. The gravitational waves produced by chirality imbalance can be detected by LISA, Taiji and DECIGO, with the peak energy density locating in the range of $10^{-11}$ to $10^{-9}$ and the peak frequencies lying in the range of $10^{-5}$ Hz to $10^{-2}$ Hz. The spectrum with larger axial vector coupling strength and stronger magnetic field has higher peak energy density and lower peak frequency. According to this trend, the gravitational waves spectra might also be able to be detected by SKA, IPTA and EPTA. The Phase transition inverse duration $β/H_*$ calculated from the bounce solution is in the order of $10^4$, which is much higher than typical value $10-100$ from electroweak phase transitions. Based on the mechanism of postponement of the false vacuum decay, it is found that the formation of the primordial black hole is not favored because the phase transition completes in an extreme short time due to the large value of $β/H_*$ and thus the false vacuum energy density decays sharply.
