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VOLUME 75 (2002) | ISSUE 2 | PAGE 63
Momentum space topology of fermion zero modes on brane
PACS: 04.50.+h, 11.25.Mj, 11.27.+d, 73.43.-f
Abstract
We discuss fermion zero modes within the 3+1 brane - the domain wall between the two vacua in 4+1 spacetime. We do not assume relativistic invariance in 4+1 spacetime, or any special form of the 4+1 action. The only input is that the fermions in bulk are fully gapped and are described by nontrivial momentum-space topology. Then the 3+1 wall between such vacua contains chiral 3+1 fermions. The bosonic collective modes in the wall form the gauge and gravitational fields. In principle, this universality class of fermionic vacua can contain all the ingredients of the Standard Model and gravity.