Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-01-14
Phys.Rev.D79:053010,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 3 figures. v2: typo corrected, references improved, small textual modifications. Version submitted to journal
Scientific paper
10.1103/PhysRevD.79.053010
We reappraise the question whether the Standard Model, and Minimal Flavor Violating (MFV) models at large, can simultaneously describe the observed CP violation in the K- and Bd-systems. We find that CP violation in the Bd-system, measured most precisely through (sin 2 beta)_{J/psi Ks}, implies |epsilon_K^{SM}| = 1.78(25) x 10^{-3} for the parameter epsilon_K, measuring indirect CP violation in the K-system, to be compared with the experimental value |epsilon_K^{exp}| = 2.23(1) x 10^{-3}. To bring this prediction to 1 sigma agreement with experiment, we explore then the simplest new-physics possibility not involving new phases, namely that of MFV scenarios with no new effective operators besides the Standard Model ones. We emphasize the crucial input and/or measurements to be improved in order to probe this case. In particular we point out that this tension could be removed in this framework, with interesting signatures, e.g. correlated suppression patterns for rare K decay branching ratios. On the other hand, MFV contributions from new operators appear, in the calculable case of the MSSM, to worsen the situation. We finally explore some well-motivated new-physics scenarios beyond MFV, like those involving generic new contributions in Z-penguins.
Buras Andrzej J.
Guadagnoli Diego
No associations
LandOfFree
On the consistency between the observed amount of CP violation in the K- and Bd-systems within minimal flavor violation 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 On the consistency between the observed amount of CP violation in the K- and Bd-systems within minimal flavor violation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the consistency between the observed amount of CP violation in the K- and Bd-systems within minimal flavor violation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-375882