CP violation versus flavour in supersymmetric theories

被引:4
作者
Abel, S
Branco, GC
Khalil, S
机构
[1] CFIF, Inst Super Tecn, Dept Fis, P-1049001 Lisbon, Portugal
[2] Ain Shams Univ, Fac Sci, Cairo 11566, Egypt
关键词
D O I
10.1016/j.physletb.2003.07.012
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We show that the quark flavour structure and CP violating phenomena are strongly correlated in supersymmetric theories. For a generic pattern of supersymmetry breaking the two broad categories of Yukawa couplings, democratic and hierarchical textures, have entirely different phenomenological implications. With hierarchical Yukawas, the rephasing invariant phase, arg((VusVcbVcbVcs*)-V-*), in the CKM mixing matrix has to be of order unity, while the SUSY CP violating phases are severely constrained by electric dipole moments, giving rise to the so-called SUSY CP problem. With democratic Yukawas, all experimental CP results can be accommodated with small values for the CKM and SUSY CP violating phases (i.e., CP can be considered as an approximate symmetry at the high energy scale). We also show that within this scenario, an entirely real CKM matrix in supersymmetric models is still allowed by the present experimental results. (C) 2003 Published by Elsevier B.V.
引用
收藏
页码:14 / 24
页数:11
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