Can ε'/εbe supersymmetric?

Details Can ε'/εbe supersymmetric? Can ε'/εbe supersymmetric?

1999-03-16

arxiv.org/abs/hep-ph/9903363v2

Phys.Rev.Lett.83:907-910,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages. Typos, references, and a few numerical errors corrected. Final version accepted by PRL

Scientific paper

10.1103/PhysRevLett.83.907

The possible supersymmetric contribution to \epsilon'/\epsilon has been generally regarded small in the literature. We point out, however, that this is a result based on specific assumptions, such as universal scalar mass, and in general needs not to be true. Based on a general situation, (1) hierarchical quark Yukawa matrices protected by flavor symmetry, (2) generic dependence of Yukawa matrices on Polonyi/moduli fields as expected in many supergravity/superstring theories, (3) Cabibbo rotation originating from the down-sector, and (4) phases of order unity, we find the typical supersymmetric contribution to \epsilon'/\epsilon to be order 3x10^-3 for m_{\tilde{q}} = 500 GeV. It is even possible that the supersymmetric contribution dominates in the reported KTeV value \epsilon'/\epsilon = (28 \pm 4.1)x10^-4. If so, the neutron electric dipole moment is likely to be within the reach of the currently planned experiments.

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