Strong CP-Problem in Superstring Theory

Details Strong CP-Problem in Superstring Theory Strong CP-Problem in Superstring Theory

1992-05-20

arxiv.org/abs/hep-ph/9205225v1

Prog.Theor.Phys. 88 (1992) 751-758

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, DPKU9205

Scientific paper

10.1143/PTP.88.751

We apply the solution for the strong CP-problem in the 4-dimensional superstring theory recently proposed by Ib${\rm\acute{a}\tilde{n}}$ez and L${\rm\ddot{u}}$st to Calabi-Yau type models and study its phenomenological aspects. In Calabi-Yau type models there seem to be phenomenologically difficult problems in the axion decoupling from the neutral gauge currents and the compatibility between the proton stability and the cosmological bound on the axion. DFSZ type invisible axion mechanism which works without heavy extra colored fields may be more promising than KSVZ axion in the viewpoint of proton stability.

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