Phenomenological Description of an Unstable Fermion

Jiang Liu

paper

Phenomenological Description of an Unstable Fermion

arXiv:hep-ph/9304213

Abstract

We present a phenomenological description for an unstable fermion based upon one-loop renormalization of quantum field theory. It is emphasized that wave function renormalization can introduce important $C P$ -conserving and $C P$ -violating phases. Implications for the study of $C P$ violation are examined. Applications are given to $C P$ -violating asymmetries in the $t$ decays: $t \to b W^{+}, b H^{+}$ , in which we show that a naive calculation following the standard rule either is incomplete or violates $C P T$ .

20 pages, one Feynman diagram (not included), UPR-0558T