Phenomenological Description of an Unstable Fermion

Details Phenomenological Description of an Unstable Fermion Phenomenological Description of an Unstable Fermion

1993-04-05

arxiv.org/abs/hep-ph/9304213v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

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 $CP$-conserving and $CP$-violating phases. Implications for the study of $CP$ violation are examined. Applications are given to $CP$-violating asymmetries in the $t$ decays: $t\to bW^+, bH^+$, in which we show that a naive calculation following the standard rule either is incomplete or violates $CPT$.

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