论文标题
在$ su（5）\ times u（1）'$ f理论模型的LHC签名上
On the LHC signatures of $SU(5)\times U(1)'$ F-theory motivated models
论文作者
论文摘要
我们研究了基于$ u（1）'$对称性扩展的F理论肠道模型的低能含义，该模型在非全额外的三个家族的Quark和Lepton家族中。该规格组自然来自椭圆形内部空间的最大特殊量规对称性，在一个增强的点，$ e_8 \ supset su（5）\ times su（5）'\ supset su（5）\ supset su（5）\ times \ times u（times u（1）^4 $。通过施加$ Z_2 $单型群群来确保排名一号的质量质地和树级顶部的夸克耦合，可以确定上述破裂序列的两个Abelian因素。量规对称的$ u（1）'$系数是剩下的三个Abelian对称性的无异常线性组合，剩下的$ z_2 $。获得了几类模型，就表示形式的$ U（1）'费用而区分，并在类似矢量的表示中获得了额外的零模式。研究了这些模型的预测，并将其与LHC结果和其他相关实验进行了比较。还讨论了解释LHCB和Babar实验中观察到的B-膜异常的特定病例。
We study low energy implications of F-theory GUT models based on $SU(5)$ extended by a $U(1)'$ symmetry which couples non-universally to the three families of quarks and leptons. This gauge group arises naturally from the maximal exceptional gauge symmetry of an elliptically fibred internal space, at a single point of enhancement, $E_8\supset SU(5)\times SU(5)'\supset SU(5)\times U(1)^4$. Rank-one fermion mass textures and a tree-level top quark coupling are guaranteed by imposing a $Z_2$ monodromy group which identifies two abelian factors of the above breaking sequence. The $U(1)'$ factor of the gauge symmetry is an anomaly free linear combination of the three remaining abelian symmetries left over by $Z_2$. Several classes of models are obtained, distinguished with respect to the $U(1)'$ charges of the representations, and possible extra zero modes coming in vector-like representations. The predictions of these models are investigated and are compared with the LHC results and other related experiments. Particular cases interpreting the B-meson anomalies observed in LHCb and BaBar experiments are also discussed.
