Published in

World Scientific Publishing, Modern Physics Letters A, 33(22), p. 2533-2538

DOI: 10.1142/s0217732307022736

Links

Tools

Export citation

Search in Google Scholar

The Effects on S, T and U from Higher-Dimensional Fermion Representations

Journal article published in 2007 by Hong-Hao Zhang, Yue Cao ORCID, Qing Wang
This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Green circle
Preprint: archiving allowed
Upload
Green circle
Postprint: archiving allowed
Upload
Red circle
Published version: archiving forbidden
Policy details
Data provided by SHERPA/RoMEO

Abstract

Inspired by a new class of walking technicolor models recently proposed using higher-dimensional technifermions, we consider the oblique corrections from heavy nondegenerate fermions with two classes of higher-dimensional representations of the electroweak gauge group itself. One is chiral SM-like, and the other is vector-like. In both cases, we obtain explicit expressions for S, T, U in terms of the fermion masses. We find that to keep the T parameter ultraviolet-finite, there must be a stringent constraint on the mass nondegeneracy of a heavy fermion multiplet.