GAUGE-MODEL WITH LIGHT W-BOSONS AND Z-BOSONS
GAUGE-MODEL WITH LIGHT W-BOSONS AND Z-BOSONS
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DOI：
10.1103/physrevd.22.727
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发表时间：
1980-01-01
影响因子：
5
通讯作者：
MA, E
中科院分区：
文献类型：
--
作者：
BARGER, V;KEUNG, WY;MA, E
我们证明了标准电弱规范模型如何自然地推广到SU（2）× U（1）× SU（2 π '，它的规范玻色子数是标准模型的两倍.所有已知的费米子都相对于SU（2）× U（1）进行变换;自发对称性破缺是通过连接SU（2）和SU（2）'以及通常的标量双重态的标量四重态实现的。低能时的相互作用哈密顿量再现了标准模型的低能现象。探讨了该模型的高能量预测。一个W和一个Z的质量小于标准模型中相应的玻色子。这些轻玻色子相对较窄，总宽度通常为50 MeV。给出了e+ e−碰撞和强子碰撞中光Z和W产生的截面。低至32 GeV的Z质量与现有的测量结果相容;目前最严格的限制是由e+ e−湮灭截面设定的。
We show how the standard electroweak gauge model can be naturally generalized to SU (2)× U (1)× SU (2)', which has twice the number of gauge bosons of the standard model. All known fermions transform with respect to SU (2)× U (1); spontaneous symmetry breaking is achieved with a scalar quartet which links SU (2) and SU (2)'and the usual scalar doublet. The interaction Hamiltonian at low energy reproduces the low-energy phenomenology of the standard model. The high-energy predictions of the model are explored. One W and one Z are less massive than the corresponding bosons of the standard model. These light bosons are relatively narrow, with total widths typically 50 MeV. Cross sections for light Z and W production in e+ e− collisions and hadron collisions are given. A Z mass as low as 32 GeV is compatible with existing measurements; the most stringent present limit is set by the e+ e− annihilation cross section.