The Roma and Zaragoza actions for chiral fermions on the lattice are shown to
be essentially equivalent. The auxiliary fermion fields in the Roma model can
be integrated out, and the resulting action is a special case of the Zaragoza
approach. We use this result to perform a mean-field study of the phase diagram
of chiral Yukawa models in the Roma formulation.Comment: Contribution to Lattice '94 by A.J. van der Sijs, 3 pages PostScript
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