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arXiv hep-ph/9306318hep-ph
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最小超对称标准模型的自然CP破坏准则

Natural CP Violation Criteria for the Minimal Supersymmetric Standard Model

Robert Garisto

摘要:

最小超对称标准模型(MSSM)中的$CP$破坏效应会导致对中子EDM(\dn)的贡献过大。我们写的标准,确保低能量超重力(SUGRA)参数化的MSSM不需要微调或大质量尺度,以逃避约束\dn,并考虑对SUGRA理论的影响。特别是,我们表明,在Polonyi模型中,两个质量尺度一般是复杂的,这意味着该模型并不自然地避免一个大的\dn \有时声称。

英文摘要:

$CP$ violating effects in the Minimal Supersymmetric Standard Model (MSSM) can lead to excessively large contributions to the neutron EDM (\dn). We write criteria which ensure that the low energy supergravity (SUGRA) parametrization of the MSSM does not require fine-tunings or large mass scales to evade the constraint from \dn, and consider the implications on SUGRA theories. In particular, we show that in the Polonyi model, two of the mass scales are in general complex, meaning that model does not naturally avoid a large \dn\ as is sometimes claimed.

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