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arXiv 1205.4483hep-phhep-ex
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最小扩展标准模型的三代问题

Three Generations in Minimally Extended Standard Models

Paul H. Frampton, Chiu Man Ho, Thomas W. Kephart

摘要:

我们提出了一类具有规范群$SU(3)_C \times SU(N)_L \times U(1)_X$的最小扩展标准模型,其中对于所有的$N \geq 3$,异常消除需要三代。在低能量下,我们恢复了标准模型(SM),而在更高的能量下,必须存在夸克,轻子和规范玻色子,其电荷从它们的SM值移动了电子电荷的整数倍,直到$ \pm [N/2] e$。由于N=5是与QCD渐近自由一致的最高$N$,我们详细讨论了3-5-1模型。

英文摘要:

We present a class of minimally extended standard models with the gauge group $SU(3)_C \times SU(N)_L \times U(1)_X$ where for all $N \geq 3$, anomaly cancelation requires three generations. At low energy, we recover the Standard Model (SM), while at higher energies, there must exist quarks, leptons and gauge bosons with electric charges shifted from their SM values by integer multiples of the electron charge up to $ \pm [N/2] e$. Since the value N=5 is the highest $N$ consistent with QCD asymptotic freedom, we elaborate on the 3-5-1 model.

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