Weyl and ghost fermions on the lattice

Details Weyl and ghost fermions on the lattice Weyl and ghost fermions on the lattice

2010-10-25

arxiv.org/abs/1010.5156v1

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, latex

Scientific paper

Nielsen-Ninomiya theorem forbids Weyl fermions on the lattice which respect the full hypercubic symmetry. By giving up this assumption in a specific way, it is possible to formulate a lattice theory with a single Weyl fermion in four dimensions and a sextet of Dirac particles in two dimensions. This way, the meaning of the theorem in relation to the doubling problem on the lattice is clarified. Whether the proposal will be suited for future lattice computations will depend on the effects the extra particles will have in the interacting theory.

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