arXiv 1312.40102013-12-14hep-ph

Higgs粒子的精确测量和味物理：一个超对称的例子

Higgs Precision Measurements and Flavor Physics: A Supersymmetric Example

Kai Wang, Guohuai Zhu

备注：: Review for Chinese Science Bulletin and CEPC SPPC Proposal
发表信息：: Chin.Sci.Bull. 59 (2014) 3703-3708
DOI：: 10.1007/s11434-014-0390-7

摘要：

【中国科学通报》与CEPC+SPPC方案述评】味物理中的稀有衰变常受到螺旋度抑制和环抑制。螺旋翻转是手征$U(3)$对称性破缺和电弱对称性破缺的直接结果。SM费米子的质量产生也具有相同的特征。本文以MSSM为例，说明了底Yukawa耦合与$b\to sγ$稀有衰变过程之间的明确联系。采用对称性方法研究了底夸克质量产生超对称修正和$b\to sγ$中常见的对称性破缺。结果表明，$b\to sγ$所需的大Peccei-Quinn对称性破缺效应和$R$对称性破缺效应不可避免地导致了底Yukawa ${y}_{b}$的显著减少.为了折衷$b\bar{b}$的减少，还需要一个新的衰变来保持希格斯粒子的总宽度作为SM值。

英文摘要：

[Review for "Chinese Science Bulletin" and CEPC+SPPC Proposal] Rare decays in flavor physics often suffer from Helicity suppress and Loop suppress. Helicity flip is a direct consequence of chiral $U(3)$ symmetry breaking and electroweak symmetry breaking. The identical feature is also shared by the mass generation of SM fermions. In this review, we use MSSM as an example to illustrate an explicit connection between bottom Yukawa coupling and rare decay process of $b\to sγ$. We take a symmetry approach to study the common symmetry breaking in supersymmetric correction to bottom quark mass generation and $b\to sγ$. We show that Large Peccei-Quinn symmetry breaking effect and $R$-symmetry breaking effect required by $b\to sγ$ inevitably lead to significant reduction of bottom Yukawa ${y}_{b}$. To compromise the reduction in $b\bar{b}$, a new decay is also needed to keep the Higgs total width as the SM value.

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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