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Unitarity Triangle Analysis: An Update

Abstract : We present the update of the Unitarity Triangle analysis performed by the UTfit Collaboration within the Standard Model and beyond. Within the Standard Model, we find an overall consistency among the constraints, with some tension between the fit prediction and the experimental measurement of BR(B→τν), _sin2β and ε_K. Generalising the analysis beyond the Standard Model, we allow for New Physics effects in all ΔF=2 processes simultanously. We obtain constraints on the parameters of the Cabibbo-Kobayashi-Maskawa matrix together with the New Physics ones. We find that a deviation from the Standard Model at the 3.1σ level in the B_s-Bbar_s mixing phase is confirmed by the present update, which includes the new DØ result on the dimuon charge asymmetry. However the new CDF measurement of φ_s is not included yet as the experimental likelihood is not publicly available.
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Submitted on : Monday, March 28, 2011 - 10:19:24 AM
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A.J. Bevan, M. Bona, M. Ciuchini, D. Derkach, E. Franco, et al.. Unitarity Triangle Analysis: An Update. Third Workshop on Theory, Phenomenology and Experiments in Heavy Flavour Physics, Jul 2010, Capri, Italy. pp.109-114, ⟨10.1016/j.nuclphysbps.2010.12.019⟩. ⟨in2p3-00580389⟩



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