Non-Commutative Differential Geometry and Standard Model

Details Non-Commutative Differential Geometry and Standard Model Non-Commutative Differential Geometry and Standard Model

1995-10-17

arxiv.org/abs/hep-th/9510099v1

Prog.Theor.Phys. 95 (1996) 227-248

Physics

High Energy Physics

High Energy Physics - Theory

27 pages

Scientific paper

10.1143/PTP.95.227

We incorporate Sogami's idea in the standard model into our previous formulation of non-commutative differential geometry by extending the action of the extra exterior derivative operator on spinors defined over the discrete space-time; four dimensinal Minkovski space multiplyed by two point discrete space. The extension consists in making it possible to require that the operator become nilpotent when acting on the spinors. It is shown that the generalized field strength leads to the most general, gauge-invariant Yang-Mills-Higgs Lagrangian even if the extra exterior derivative operator is not nilpotent, while the fermionic part remains intact. The proof is given for a single Higgs model. The method is applied to reformulate the standard model by putting left-handed fermion doublets on the upper sheet and right-handed fermion singlets on the lower sheet with generation mixing among quarks being taken into account. We also present a matrix calculus of the method without referring to the discrete space-time.

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