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Fermion-fermion condensates and CP violation

1981; Elsevier BV; Volume: 192; Issue: 1 Linguagem: Inglês

10.1016/0550-3213(81)90193-0

1873-1562

A. Masiero, R. N. Mohapatra, R. D. Peccei,

Quantum Chromodynamics and Particle Interactions

We discuss some theoretical difficulties of the standard Kobayashi-Maskawa scheme for CP violation and present an alternative scenario where CP violation arises through non-vanishing phases in fermion-fermion condensates. We illustrate our ideas in the context of a left-right symmetric model with a hierarchy of mass scales (MWR⪢MWL). We show that the mass scale hierarchy leads naturally to a negligible θ-parameter at tree level, θtree∼(MWLMWR)2, with this result being preserved in higher order. The resulting theory of CP violation in the kaon sector is of the superweak type and the electric dipole moment of the neutron is essentially determined by θ. There is no direct connection in the model between the phases responsible for the univers's baryon asymmetry and those responsible for CP violation in the kaon system — a result we claim is a general feature of gauge theory models of unified interactions.