Numerical evidence for a CP broken deconfined phase at $\theta =\pi$ in 4D SU(2) Yang-Mills theory through simulations at imaginary $\theta$

Mitsuaki Hirasawa, Masazumi Honda, Akira Matsumoto +2

We investigate the possibility of the spontaneous breaking of CP symmetry in 4D SU(2) Yang-Mills at $\theta =\pi$, which has recently attracted much attention in the context of the higher-…