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 -> tau nu), sin 2 beta and epsilon(K). Generalising the analysis beyond the Standard Model, we allow for New Physics effects in all Delta F = 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 3.1 sigma level in the B-s-(B) over bar (s) mixing phase is confirmed by the present update, which includes the new Dempty set result on the dimuon charge asymmetry. However the new CDF measurement of phi(s) is not included yet as the experimental likelihood is not publicly available.
Bevan, A.j., Bona, M., Ciuchini, M., Derkach, D., Franco, E., Lubicz, V., et al. (2010). Unitarity Triangle Analysis: An Update. In Proceedings of the 3rd Workshop on Theory, Phenomenology and Experiments in Heavy Flavour Physics (pp.109-114). Amsterdam : Elsevier [10.1016/j.nuclphysbps.2010.12.019].
Unitarity Triangle Analysis: An Update
LUBICZ, Vittorio;TARANTINO, CECILIA;
2010-01-01
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 -> tau nu), sin 2 beta and epsilon(K). Generalising the analysis beyond the Standard Model, we allow for New Physics effects in all Delta F = 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 3.1 sigma level in the B-s-(B) over bar (s) mixing phase is confirmed by the present update, which includes the new Dempty set result on the dimuon charge asymmetry. However the new CDF measurement of phi(s) is not included yet as the experimental likelihood is not publicly available.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
