Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-10-05
Nucl.Phys.B573:201-222,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX2e, 31 pages. 5 eps figures included
Scientific paper
10.1016/S0550-3213(99)00807-X
We perform a combined analysis of the unitarity triangle and of the CP violating parameter epsilon'/epsilon using the most recent determination of the relevant experimental data and, whenever possible, hadronic matrix elements from lattice QCD. We discuss the role of the main non-perturbative parameters and make a comparison with other recent analyses. We use lattice results for the matrix element of Q_8 obtained without reference to the strange quark mass. Since a reliable lattice determination of the matrix element of Q_6 is still missing, the theoretical predictions for epsilon'/epsilon suffer from large uncertainties. By evaluating this matrix element with the vacuum-saturation approximation, we typically find as central value epsilon'/epsilon = (4 - 7) x 10^(-4). We conclude that the experimental data suggest large deviation of the value of the matrix element of Q_6 from the vacuum-saturation approximation, possibly due to penguin contractions.
Ciuchini Marco
Franco Enrico
Giusti Leonardo
Lubicz Vittorio
Martinelli Gabriele
No associations
LandOfFree
Combined analysis of the unitarity triangle and CP violation in the Standard Model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Combined analysis of the unitarity triangle and CP violation in the Standard Model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined analysis of the unitarity triangle and CP violation in the Standard Model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-292082