MonteCarlo study of the Δϱ parameter
Abstract
We present results concerning a lattice study of the electroweak ϱparameter. We have used an SU (2) × U (1) symmetric chiral Yukawa model built with Zaragoza fermions. The decoupling of the species doublers in this model is verified numerically. We find that the numerical data for Δϱ are well described by oneloop perturbation theory in the same finite volume and with the same finite cutoff. However, a finite cutoff can cause substantial deviations of Δϱ from the standard value, even in infinite volume.
 Publication:

Nuclear Physics B Proceedings Supplements
 Pub Date:
 February 1997
 DOI:
 10.1016/S09205632(96)007530
 arXiv:
 arXiv:heplat/9608031
 Bibcode:
 1997NuPhS..53..683A
 Keywords:

 High Energy Physics  Lattice;
 High Energy Physics  Phenomenology
 EPrint:
 3 pages (LateX) with 3 figures (PostScript), uses espcrc2.sty (included). Talk presented at LATTICE96(other models)