Solution of the strong CP problem

Details Solution of the strong CP problem Solution of the strong CP problem

1996-11-07

arxiv.org/abs/hep-ph/9611266v1

Phys.Lett.B391:441-445,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages LATEX, no macros, no tables, no figures

Scientific paper

10.1016/S0370-2693(96)01488-8

I put forward an SU(2)_L x SU(2)_R x U(1) model in which spontaneously broken parity symmetry makes it that strong CP violation only arises at three-loop level. All leptons and up-type quarks are in doublets either of SU(2)_L or of SU(2)_R, but there are singlet down-type quarks. A bi-doublet of scalars is introduced which has only one component with non-vanishing expectation value, thereby avoiding W_L-W_R mixing. The scalar potential is such that scalar-pseudoscalar mixing does not occur either.

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