Ja. Aguilarsaavedra, MEASURE OF THE SIZE OF CP VIOLATION IN EXTENDED MODELS, Journal of physics. G, Nuclear and particle physics, 24(4), 1998, pp. 31-36
In this letter we explore the possibility of introducing a measure of
the size of charge-parity violation in the standard model and its exte
nsions, based on quantities invariant under the change of weak quark b
asis.