The 2004 UTfit Collaboration Report on the Status of the Unitarity Triangle in the Standard Model
Abstract
Using the latest determinations of several theoretical and experimental parameters, we update the Unitarity Triangle analysis in the Standard Model. The basic experimental constraints come from the measurements of |Vub/Vcb|, Delta Md, the lower limit on Delta Ms, epsilonk, and the measurement of the phase of the Bd - anti Bd mixing amplitude through the time-dependent CP asymmetry in B0 to J/psi K0 decays. In addition, we consider the direct determination of alpha, gamma, 2 beta + gamma and cos(2 beta) from the measurements of new CP-violating quantities, recently performed at the B factories. We also discuss the opportunities offered by improving the precision of the various physical quantities entering in the determination of the Unitarity Triangle parameters. The results and the plots presented in this paper can also be found at http://www.utfit.org, where they are continuously updated with the newest experimental and theoretical results.
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