Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1848763 | Nuclear Physics B - Proceedings Supplements | 2013 | 6 Pages |
Abstract
We present the summer 2012 update of the Unitarity Triangle (UT) analysis performed by the UTfit Collaboration within the Standard Model (SM) and beyond. The increased accuracy on several of the fundamental constraints is now enhancing some of the tensions amongst and within the constraint themselves. In particular, the long standing tension between exclusive and inclusive determinations of the Vub and Vcb CKM matrix elements is now playing a major role. Then we present the generalisation the UT analysis to investigate new physics (NP) effects, updating the constraints on NP contributions to ÎF=2 processes. In the NP analysis, both CKM and NP parameters are fitted simultaneously to obtain the possible NP effects in any specific sector. Finally, based on the NP constraints, we derive upper bounds on the coefficients of the most general ÎF=2 effective Hamiltonian. These upper bounds can be translated into lower bounds on the scale of NP that contributes to these low-energy effective interactions.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
A. Bevan, M. Bona, M. Ciuchini, D. Derkach, E. Franco, L. Silvestrini, V. Lubicz, C. Tarantino, G. Martinelli, F. Parodi, C. Schiavi, M. Pierini, V. Sordini, A. Stocchi, V. Vagnoni,