New mixing angles in the left-right symmetric model

作者：Kokado Akira; Saito Takesi

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2015, 92(12): 125008.

DOI：10.1103/PhysRevD.92.125008

In the left-right symmetric model neutral gauge fields are characterized by three mixing angles theta(12), theta(23), theta(13) between three gauge fields B-mu, W-L mu(3), W-R mu(3), which produce mass eigenstates A(mu), Z(mu), Z'(mu), when G = SU(2)(L) x SU(2)(R) x U(1)(B-L) x D is spontaneously broken down until U(1)(em). We find a new mixing angle theta', which corresponds to the Weinberg angle theta(W) in the standard model with the SU(2)(L) x U(1)(Y) gauge symmetry, from these mixing angles. It is then shown that any mixing angle theta(ij) can be expressed by epsilon and theta', where epsilon = g(L)/g(R) is a ratio of running left-right gauge coupling strengths. We observe that light gauge bosons are described by theta' only, whereas heavy gauge bosons are described by two parameters epsilon and theta'.

• 出版日期2015-12-8