左右手对称模型中重中微子衰变  

Heavy neutrino decays in left-right symmetric model

作　　者：覃仁晖 贺麟云 宁国柱 QIN Renhui;HE Linyun;NING Guozhu(College of Physics Science and Technology,Hebei University,Baoding 071002,China)

机构地区：[1]河北大学物理科学与技术学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2023年第2期139-145,共7页Journal of Hebei University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11605037)。

摘　　要：在左右手对称模型中,考虑重中微子质量少于左手规范玻色子W_(L)的质量,计算了重中微子的各类衰变,发现重中微子总衰变宽度按贡献可以分为左手部分为主、右手部分为主以及左右手部分可比拟3种情况.结果表明:当轻重中微子混合取最大值1,右手规范玻色子W R取实验允许的最低质量时,重中微子总衰变宽度仍然远小于其质量.In left-right symmetric model,various kinds of decay channels of heavy neutrino are evaluated when its mass is lighter than the mass of left handed gauge boson W_(L).It is found that the total decay rate of heavy neutrino can be classified into left part dominance,right part dominance,and coexistence of left and right part.The results shows that when the heavy-light neutrino mixings is equaled to 1 and the mass of right handed gauge boson W R is taken to be the lightest one satisfied by experiments,the total decay rate of heavy neutrino is still far smaller than its mass.

关 键 词：重中微子 轻子数破坏 衰变宽度 左右手对称模型 

分 类 号：O412.3[理学—理论物理]