Constraints on spin-3/2 and excited spin-1/2 fermions coming from the leptonic Z0-partial width

Abstract

We consider effective interactions among excited spin-1/2 and spin-3/2 leptons with the usual ones. Assuming that these new leptons are lighter than the Z0 we will study the constraints on their masses and compositeness scale coming from the leptonic Z0 partial width.

Comments: Typeset using REVTEX 2.0, 9 pages and 3 figures (available upon request)