ar X iv : h ep - p h / 99 06 37 4 v 1 1 5 Ju n 19 99 BA - 99 - 44 SUPERSYMMETRIC CP VIOLATION ε ′ / ε DUE TO ASYMMETRIC A - MATRIX
نویسندگان
چکیده
We study contributions of supersymmetric CP phases to the CP violation ε/ε in models with asymmetric A-matrices. We consider asymmetric Amatrices, which are obtained from string-inspired supergravity. We show that a certain type of asymmetry of A-matrices enhances supersymmetric contributions to the CP violation ε/ε and the supersymmetric contribution to ε/ε can be of order of the KTeV result, ε/ε ∼ 10. 1. CP violation is sensitive to physics beyond the standard model (SM), that is, CP violation , as well as flavor changing neutral current (FCNC) processes, constrains significantly physics beyond the SM, e.g., supersymmetric models. On the other hand, if any deviation of CP violation from the SM is observed, that would be a strong hint to physics beyond the SM. Many works have been done on CP violation in supersymmetric models [1, 2, 3, 4]. Recently the KTeV collaboration at Fermilab has reported a measurement of the direct CP-violation in K → ππ decays [5] Re(ε′/ε) = (28± 4)× 10.
منابع مشابه
ar X iv : h ep - p h / 99 08 44 2 v 2 2 4 A ug 1 99 9 August 23 , 1999 LBNL - 44172 UCB - PTH
I first motivate why we may want to look at possible new physics contributions to ε given relatively clear experimental but unclear theoretical situations. I reexamine the supersymmetric contribution to ε and find an important one generally missed in the literature. Based on rather model-independent arguments based on flavor symmetries, an estimate of the possible supersymmetric ε is given, whi...
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