论文标题
两代$ {\ rm su}（7）$型号具有扩展弱部门的模型：大众等级，混合和风味非大学
A two-generational ${\rm SU}(7)$ model with extended weak sector: mass hierarchies, mixings, and the flavor non-universality
论文作者
论文摘要
我们研究了$ {\ rm su}（7）$大统一理论的可能的量规对称性破坏模式，该理论描述了第二代和第三代的所有电动电动SM费米的质量起源。 $ {\ cal g} _ {341} \ equiv {\ rm su}（3）_c \ outimes {\ rm su}（4）_W \ outimes {\ outimes {\ rm um u}（1）_ {x_0} $ {x_0} $ {_ { {\ rm su}（3）_c \ otimes {\ rm su}（3）_W \ otimes {\ rm u}（1）_ {x_1} $出现在电片刻度上方。可以通过广义的Seesaw机制获得两代之间的Sm fermion质量层次结构。可以通过从多个希格斯字段中抑制对称性破坏VEV来实现该机制，这些vev是避免higgs潜力中t ter项所必需的。将描述$ {\ rm su}（7）$ fermion Spectrum的某些一般特征，其中包括存在类似矢量的费米子，树级的风味改变了Sm fermions和重型伴侣费米子之间的弱电流，以及来自扩展弱部门不同SM世代之间的非大学味道非大学性的风味。
We study a possible gauge symmetry breaking pattern in an ${\rm SU}(7)$ grand unified theory, which describes the mass origins of all electrically charged SM fermions of the second and the third generations. Two intermediate gauge symmetries of ${\cal G}_{341}\equiv {\rm SU}(3)_c \otimes {\rm SU}(4)_W \otimes {\rm U}(1)_{X_0}$ and ${\cal G}_{331}\equiv {\rm SU}(3)_c \otimes {\rm SU}(3)_W \otimes {\rm U}(1)_{X_1}$ arise above the electroweak scale. SM fermion mass hierarchies between two generations can be obtained through a generalized seesaw mechanism. The mechanism can be achieved with suppressed symmetry breaking VEVs from multiple Higgs fields that are necessary to avoid tadpole terms in the Higgs potential. Some general features of the ${\rm SU}(7)$ fermion spectrum will be described, which include the existence of vectorlike fermions, the tree-level flavor changing weak currents between the SM fermions and heavy partner fermions, and the flavor non-universality between different SM generations from the extended weak sector.
