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Eur. Phys. J. C 20, 239-252
DOI: 10.1007/s100520100663

Mixing-matrix renormalization revisited

A.O. Bouzas

Departamento de Física Aplicada, CINVESTAV-IPN, Carretera Antigua a Progreso Km. 6, Apdo. Postal 73 "Cordemex" , Mérida 97310, Yucatán, Mexico

(Received: 13 December 2000 / Published online: 11 May 2001 -© Springer-Verlag / Società Italiana di Fisica 2001)

Abstract
We study the renormalization of normal mixing matrices, which include hermitian and unitary matrices as particular cases. We give a minimal, multiplicative parameterization of counterterms, and compute the renormalized Lagrangian to one-loop order in several simple models with N species of fermions, both in on-shell and $\overline{\mathrm{MS}}$ schemes. In the on-shell scheme the mass-degenerate case is considered separately.



© Società Italiana di Fisica, Springer-Verlag 2001