General CP violation in minimal left–right symmetric model and constraints on the right-handed scale Original Research Article

In minimal left–right symmetric theories, the requirement of parity invariance allows only one complex phase in the Higgs potential and one in the Yukawa couplings, leading to a two-phase theory with both spontaneous and explicit CP violations. We present a systematic way to solve the right-handed quark mixing matrix analytically in this model and find that the leading order solution has the same hierarchical structure as the left-handed CKM matrix with one more CP-violating phase coming from the complex Higgs vev. Armed with this explicit right-handed mixing matrix, we explore its implications for flavor changing and conserving processes in detail, low-energy CP-violating observables in particular. We report an improved lower bound on the image mass of 2.5 TeV from image and image, and a somewhat higher bound (4 TeV) from kaon decay parameters ϵ, image, and neutron electric dipole moment. The new bound on the flavor-changing neutral Higgs mass is 25 TeV.