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20-27 juillet 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone
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Contribution Parallel session talk

Alpes Congrès - Alpexpo - les Ecrins 3
Flavour Physics and Fundamental Symmetries

Standard Model updates and new physics analysis with the Unitarity Triangle fit,


  • Dr. Marcella BONA

Auteurs principaux

Abstract content

We present the summer 2011 update of the Unitarity Triangle (UT) analysis performed by the UTfit Collaboration within the Standard Model (SM) and beyond. Within the SM, combining the direct measurements on sides and angles, the UT is over-constrained allowing for the most accurate SM predictions and for investigation on the tensions due to the most recent updates from experiments and theory. Generalizing the UT analysis to investigate NP effects, constraints on b -> s transitions are also included and both CKM and NP parameters are fitted simultaneously. The inputs to this analysis include the updated Tevatron analyses on B_s-\bar B_s mixing that are significantly improving the NP constraints on the previously unexplored B_s sector. Finally, based on the NP analysis, we derive upper bounds on the coefficients of the most general Delta F=2 effective Hamiltonian. These upper bounds can be translated into lower bounds on the scale of new physics that contributes to these low-energy effective interactions.