The S, U and Δρparameters in the Zaragoza proposal for lattice chiral gauge fermions

Details The S, U and Δρparameters in the Zaragoza proposal for lattice chiral gauge fermions The S, U and Δρparameters in the Zaragoza proposal for lattice chiral gauge fermions

1992-11-27

arxiv.org/abs/hep-lat/9211065v1

Nucl.Phys.B407:373-386,1993

Physics

High Energy Physics

High Energy Physics - Lattice

17 Pages. Texis. WASH-U-HEP/92-89

Scientific paper

10.1016/0550-3213(93)90063-U

Using the Zaragoza proposal for lattice chiral gauge fermions, the S, U and \Delta\rho parameters have been calculated at one loop. It is shown that the continuum values for these quantities can be reproduced without requiring explicit fine tuning of counterterms. Furthermore, fermion fields doubling is not necessary. To the best of our knowledge, the Zaragoza proposal is the only scheme which has these properties. A necessary (although not sufficient) symmetry is found to support the calculations. Previous results for some of these parameters in other lattice chiral regularizations are revisited in the light of this symmetry.

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