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arXiv 1002.0227hep-ph
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用轻费米子质量约束MSSM超费米子质量矩阵

Constraining the MSSM sfermion mass matrices with light fermion masses

Andreas Crivellin, Jennifer Girrbach

摘要:

研究了一般MSSM中费米子质量和混合矩阵的有限超对称圈修正。在这方面的影响,非去耦的手征增强的自能进行了研究,超出了领先阶微扰理论。这些非线性光学修正不仅是CKM矩阵重整化为幺正所必需的,而且对轻费米子质量的计算也很重要。针对具有一般味道结构的三线性A项,应用t Hooft的自然性准则,我们得到了手征变化质量插入δ ^{f\,LR,RL}_{IJ}的很强的界.特别地,如果同时$δ^{u\,LR}_{13}$不等于零,则对上夸克质量的NLO修正允许我们约束无界元δ ^{u\,RL}_{13}。我们的结果是重要的单顶生产在LHC。

英文摘要:

We study the finite supersymmetric loop corrections to fermion masses and mixing matrices in the generic MSSM. In this context the effects of non-decoupling chirally-enhanced self-energies are studied beyond leading order in perturbation theory. These NLO corrections are not only necessary for the renormalization of the CKM matrix to be unitary, they are also numerically important for the light fermion masses. Focusing on the tri-linear A-terms with generic flavor-structure we derive very strong bounds on the chirality-changing mass insertions delta^{f\,LR,RL}_{IJ} by applying 't Hooft's naturalness criterion. In particular, the NLO corrections to the up quark mass allow us to constrain the unbounded element delta^{u\,RL}_{13} if at the same time $δ^{u\,LR}_{13}$ is unequal to zero. Our result is important for single-top production at the LHC.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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