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arXiv 0911.2299hep-ph
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Yukawas的统一及其影响

Unification for Yukawas and its implications

Ts. Enkhbat

摘要:

在非极小软项的存在下,研究了超对称有限阈值效应,这些软项可以修正极小SU(5)大统一理论中光产生的质量比问题。我们表明,与大的软A-条款,可以实现简单的统一,没有额外的希格斯多重态,而轻于1 TeV的sfermions代。如此大的A项的存在会使sfermion质谱在从大统一尺度向下运行到电弱尺度时发生扭曲,使其与普遍的超对称性破缺情形不同,特别是在前两代。研究了这些分裂在K和D介子振荡中的意义,以及在D^+ -> pi^+ nu anti-nu和K^+ -> pi^+ nu anti-nu的稀有过程中的意义,发现在后一种情况下,这种效应是重要的。

英文摘要:

The supersymmetric finite threshold effects are studied in the presence of non minimal soft terms that can correct the problematic mass ratios of the light generations in the minimal SU(5) GUT. We show that with large soft A-terms, one can achieve simple unification for lighter generations without additional Higgs multiplet, while having sfermions lighter than 1 TeV. The presence of such large A-terms will distort the sfermion mass spectrum upon running from GUT scale down to the electroweak scale making it distinct from the universal SUSY breaking scenarios, especially in the first two generations. The implications of these splittings are studied in K and D meson oscillations and in rare processes D^+ -> pi^+ nu anti-nu and K^+ -> pi^+ nu anti-nu, and in the latter case the effect is found to be important.

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