# Gravitational waves and primordial black holes from chirality imbalanced QCD first-order phase transition with $\mathcal {P}$ and $\mathcal {CP}$ violation

@inproceedings{Shao2022GravitationalWA, title={Gravitational waves and primordial black holes from chirality imbalanced QCD first-order phase transition with \$\mathcal \{P\}\$ and \$\mathcal \{CP\}\$ violation}, author={Jing Shao and Mei Huang}, year={2022} }

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. Phase transition of the chirality imbalance is always a ﬁrst-order one in the early universe with P and 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…

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