左右手对称模型中重中微子衰变

Heavy neutrino decays in left-right symmetric model

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.