Absence of Chiral Fermions in the Eichten--Preskill Model

Details Absence of Chiral Fermions in the Eichten--Preskill Model Absence of Chiral Fermions in the Eichten--Preskill Model

1992-06-04

arxiv.org/abs/hep-lat/9206010v1

Nucl.Phys. B395 (1993) 596-622

Physics

High Energy Physics

High Energy Physics - Lattice

30 pages, no figures, Wash. U. HEP/92-80

Scientific paper

10.1016/0550-3213(93)90049-U

The model proposed by Eichten and Preskill for obtaining theories with chiral fermions from the lattice is shown to undergo spontaneous symmetry breaking. In addition, the fermions appear to be Dirac-like everywhere in the phase diagram with no room for undoubled Weyl fermions. The phase diagram of a closely related Higgs-Yukawa model is similar to that of the Smit--Swift model, which also does not give rise to chiral fermions. These results cast serious doubts on the original scenario for the emergence of chiral fermions.

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