从色磁贡献和左右对称性限制看ε'中的新物理
New physics in ε' from chromomagnetic contributions and limits on Left-Right symmetry
摘要:
色磁变味跃迁s->dg* 中的新物理可以避免标准模型的强GIM抑制,并导致对CP破坏的可观测量的大贡献,特别是对我们在这里讨论的“dg”参数。我们讨论的情况下,左右对称模型,这种贡献意味着边界上的相位的右手夸克混合矩阵,或在通用模型与大相位强约束的左右对称尺度。在第一级,给出了一个新物理模型中,作为短程系数的函数的“π”的数值公式。
英文摘要:
New physics in the chromomagnetic flavor changing transition s->dg* can avoid the strong GIM suppression of the Standard Model and lead to large contributions to CP-violating observables, in particular to the epsilon' parameter, that we address here. We discuss the case of the Left-Right symmetric models, where this contribution implies bounds on the phases of the right-handed quark mixing matrix, or in generic models with large phases a strong bound on the Left-Right symmetry scale. To the leading order, a numeric formula for epsilon' as a function of the short-distance coefficients for a wide class of models of new physics is given.
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