Chiral Fermions and Spinc structures on Matrix approximations to manifolds

Details Chiral Fermions and Spinc structures on Matrix approximations to manifolds Chiral Fermions and Spinc structures on Matrix approximations to manifolds

2002-06-30

arxiv.org/abs/hep-th/0207007v2

JHEP 0207 (2002) 057

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, no figures

Scientific paper

10.1088/1126-6708/2002/07/057

The Atiyah-Singer index theorem is investigated on various compact manifolds which admit finite matrix approximations (``fuzzy spaces'') with a view to applications in a modified Kaluza-Klein type approach in which the internal space consists of a finite number of points. Motivated by the chiral nature of the standard model spectrum we investigate manifolds that do not admit spinors but do admit $Spin^c$ structures. It is shown that, by twisting with appropriate bundles, one generation of the electroweak sector of the standard model, including a right-handed neutrino, can be obtained in this way from the complex projective space $\CP^2$. The unitary Grassmannian $U(5)/(U(3)\times U(2))$ yields a spectrum that contains the correct charges for the Fermions of the standard model, with varying multiplicities for the different particle states.

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