论文标题
Quark和Lepton Mass，与5D标准型号的非宇宙$ Z'$混合，并带有尺寸的$（3）$
Quark and Lepton Mass and Mixing with non-universal $Z'$ from a 5d Standard Model with gauged $SO(3)$
论文作者
论文摘要
我们提出了一种夸克和轻子质量的理论，并基于5D标准模型与非宇宙$ z'$耦合混合，并在新的测量$ so（3）$ isospin下以三重态转换为三胞胎。在4D有效的理论中，$ SO（3）$ isospin通过$ s^1/（\ Mathbb {Z} _2 \ times \ times \ Mathbb {z}'_ 2）$ orbifold将$ u（1）'$分解为$ u（1）'$，然后是动态损坏的，导致了巨大的$ z'$。 5D散装中的夸克和叶子以质量模式出现，Yukawa的耦合为零，而Higgs则是Brane上的Higgs，由于$ U（1）'$ Symmetry，在领先订单上零耦合到$ Z'$。但是，在$ u（1）'$中断之后，Yukawa的耦合和非宇宙$ Z'$耦合都是由重型Kaluza-Klein交易所产生的。分层夸克和Lepton群众由5D Dirac Fermion群体的层次结构产生。中微子质量和混合是由Kaluza-Klein Dirac中微子介导的一种新型IB Seesaw机制。非大学$ z'$耦合可能会导致违反$μ-e $通用性的半左右$ b $衰减比率。在此模型中，这种耦合与相应的夸克和Lepton有效Yukawa耦合有关。
We propose a theory of quark and lepton mass and mixing with non-universal $Z'$ couplings based on a 5d Standard Model with quarks and leptons transforming as triplets under a new gauged $SO(3)$ isospin. In the 4d effective theory, the $SO(3)$ isospin is broken to $U(1)'$, through a $S^1/(\mathbb{Z}_2\times \mathbb{Z}'_2)$ orbifold, then subsequently dynamically broken, resulting in a massive $Z'$. Quarks and leptons in the 5d bulk appear as massless modes, with zero Yukawa couplings to the Higgs on the brane, and zero couplings to $Z'$, at leading order, due to the $U(1)'$ symmetry. However, after the $U(1)'$ breaking, both Yukawa couplings and non-universal $Z'$ couplings are generated by heavy Kaluza-Klein exchanges. Hierarchical quark and lepton masses result from a hierarchy of 5d Dirac fermion masses. Neutrino mass and mixing arises from a novel type Ib seesaw mechanism, mediated by Kaluza-Klein Dirac neutrinos. The non-universal $Z'$ couplings may contribute to semi-leptonic $B$ decay ratios which violate $μ- e$ universality. In this model such couplings are related to the corresponding quark and lepton effective Yukawa couplings.
