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`Renormalization of fermion-flavour mixing'

Abstract: I will present an explicit on-shell framework to renormalize the 
fermion-flavour mixing matrices in and beyond the Standard Model, at one- 
loop level. The framework is based on a novel procedure to separate the 
external-leg mixing corrections into gauge-parameter-independent self-mass 
and gauge-parameter-dependent wave-function renormalization contributions. 
An important property is that this formulation complies with ultraviolet 
finiteness and gauge-parameter independence, and also preserves the basic 
structure of the theory.
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