Ii. Bigi, Cp violation and beauty decays - A case study of high impact, high sensitivity and even high precision physics, INT J MOD P, 15(8), 2000, pp. 1079-1156
The narrative of these lectures contains three main threads: (i) CP violati
on despite having so far been observed only in the decays of neutral kaons
has been recognized as a phenomenon of truly fundamental importance. The KM
ansatz, constitutes the minimal implementation of CP violation: without re
quiring unknown degrees of freedom it can reproduce the known CP phenomenol
ogy in a nontrivial way. (ii) The physics of beauty hadrons - in particular
their weak decays - opens a novel window onto fundamental dynamics: they u
sher in a new quark family (presumably the last one); they allow us to dete
rmine fundamental quantities of the Standard Model like the b quark mass an
d the CKM parameters V(cb), V(ub), V(ts) and V(td); they exhibit speedy or
even rapid B-o - (B) over bar(o) oscillations. (iii) Heavy Quark Expansions
allow us to treat B decays with an accuracy that would not have been thoug
ht possible a mere decade ago. These three threads are joined together in t
he following manner: (a) Huge CP asymmetries are predicted in B decays, whi
ch represents a decisive test of the KM paradigm for CP violation. (b) Some
of these predictions are made with high parametric reliability, which Ic)
can be translated into numerical precision through the judicious employment
of novel theoretical technologies. (d) Beauty decays thus provide us with
a rich and promising field to search for New Physics and even study some of
its salient features. At the end of it there might quite possibly be a New
Paradigm for Nigh Energy Physics. There will be some other threads woven i
nto this tapestry: electric dipole moments, and CP violation in other stran
ge and in charm decays.