THE SUPERSYMMETRIC FLAVOR PROBLEM

被引:141
作者
DIMOPOULOS, S [1 ]
SUTTER, D [1 ]
机构
[1] STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305
关键词
D O I
10.1016/0550-3213(95)00421-N
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
The supersymmetric SU(3) x SU(2) x U(1) theory with minimal particle content and general soft supersymmetry breaking terms has 110 physical parameters in its flavor sector: 30 masses, 39 real mixing angles and 41 phases. The absence of an experimental indication for the plethora of new parameters places severe constraints on theories possessing Planck- or GUT-mass particles and suggests that theories of flavor conflict with naturalness, We illustrate the problem by studying the processes mu --> e + gamma and K-0 - ($) over bar K-0 mixing which are very sensitive probes of Planckian physics: a single Planck-mass particle coupled to the electron or the muon with a Yukawa coupling comparable to the gauge coupling typically leads to a rate for mu --> e + gamma exceeding the present experimental limits. A possible solution is that the messengers which transmit supersymmetry breaking to the ordinary particles are much lighter than M(P1).
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页码:496 / 512
页数:17
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