Left-right symmetric gauge model in a noncommutative geometry on $M_4\times Z_4$

Details Left-right symmetric gauge model in a noncommutative geometry on $M_4\times Z_4$ Left-right symmetric gauge model in a noncommutative geometry on $M_4\times Z_4$

1997-03-29

arxiv.org/abs/hep-th/9703213v1

Nuovo Cim. A110 (1997) 267-294

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, LaTex file

Scientific paper

The left-right symmetric gauge model with the symmetry of $SU(3)_c\times SU(2)_L\times SU(2)_R\times U(1)$ is reconstructed in a new scheme of the noncommutative differential geometry (NCG) on the discrete space $M_4\times Z_4$ which is a product space of Minkowski space and four points space. The characteristic point of this new scheme is to take the fermion field to be a vector in a 24-dimensional space which contains all leptons and quarks. Corresponding to this specification, all gauge and Higgs boson fields are represented in $24\times 24$ matrix forms. We incorporate two Higgs doublet bosons $h$ and $SU(2)_R$ adjoint Higgs $\xi_R$ which are as usual transformed as $(2,2^\ast,0)$ and $(1,3,-2)$ under $SU(2)_L\times SU(2)_R\times U(1)$, respectively. Owing to the revise of the algebraic rules in a new NCG, we can obtain the necessary potential and interacting terms between these Higgs bosons which are responsible for giving masses to the particles included. Among the Higgs doublet bosons, one CP-even scalar boson survives in the weak energy scale and other four scalar bosons acquire the mass of the $SU(2)_R\times U(1)$ breaking scale, which is similar to the situation in the standard model. $\xi_R$ is responsible to spontaneously break $SU(2)\ma{R} \times U(1)$ down to $U(1)\ma{Y}$ and so well explains the seesaw mechanism. Up and down quarks have the different masses through the vacuum expectation value of $h$.

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