Can epsilon '/epsilon be supersymmetric?

Citation
A. Masiero et H. Murayama, Can epsilon '/epsilon be supersymmetric?, PHYS REV L, 83(5), 1999, pp. 907-910
Citations number
25
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
5
Year of publication
1999
Pages
907 - 910
Database
ISI
SICI code
0031-9007(19990802)83:5<907:CE'BS>2.0.ZU;2-Y
Abstract
Supersymmetric contributions to epsilon(I)/epsilon have been generally rega rded as small. We point out, however, that this is based on specific assump tions, such as universal scalar mass, and in general need not be true. Base d on (1) hierarchical quark Yukawa matrices protected by flavor symmetry, ( 2) generic dependence of Yukawa matrices on Polonyi/moduli fields as expect ed in many supergravity/superstring theories, (3) Cabibbo rotation originat ing from the down-sector, and (4) phases of order unity, we find the typica l supersymmetric contribution to epsilon(I)/epsilon to be of order 3 x 10(- 3) for m((q) over bar) = 500 GeV, possibly dominating the reported KTeV Col laboration value epsilon(I)/epsilon = (28 +/- 4.1) X 10(-4). If so, the neu tron electric dipole moment is likely to be within the reach of the current ly planned experiments.