Eur. Phys. J. C 21, 225-259 (2001)
DOI: 10.1007/s100520100729
A new approach to a global fit of the CKM matrix
A. Höcker1, H. Lacker1, S. Laplace1 and F. Le Diberder21 Laboratoire de l'Accélérateur Linéaire, IN2P3-CNRS et Université de Paris-Sud, BP 34, 91898 Orsay Cedex, France
2 Laboratoire de Physique Nucléaire et des Hautes Energies, 4, place Jussieu, Tour 33 r.d.c., 75005 Paris, Cedex 05, France
(Received: 18 April 2001 / Published online: 10 August 2001 -© Springer-Verlag / Società Italiana di Fisica 2001 )
Abstract
We report on a new approach to a global CKM matrix analysis
taking into account most recent experimental and theoretical
results. The statistical framework (Rfit) developed in this
paper advocates frequentist statistics. Other approaches,
such as Bayesian statistics or the 95% CL scan method are
also discussed. We emphasize the distinction of
a model testing and a model dependent, metrological phase
in which the various parameters of the theory are estimated.
Measurements and theoretical parameters entering the global
fit are thoroughly discussed, in particular with respect
to their theoretical uncertainties.
Graphical results for confidence levels are drawn
in various one and two-dimensional
parameter spaces. Numerical results are provided for
all relevant CKM parameterizations, the CKM elements
and theoretical input parameters. Predictions for
branching ratios of rare K and B meson decays
are obtained. A simple, predictive SUSY extension of
the Standard Model is discussed.
© Società Italiana di Fisica, Springer-Verlag 2001
