The unitarity triangle fit in the standard model and hadronic parameters from lattice QCD: a reappraisal after the measurements of Δms and BR(B→τντ)
By UTfit Collaboration, M. Bona, Marco Ciuchini, E. Franco, V. Lubicz, G. Martinelli, F. Parodi, M. Pierini, P. Roudeau, C. Schiavi and 3 more. 2006
432 citations recorded by the source corpus.
The recent measurements of the B0s meson mixing amplitude by CDF and of the leptonic branching fraction BR(B→τντ) by Belle call for an upgraded analysis of the Unitarity Triangle in the Standard Model. Besides improving the previous constraints on the parameters of the CKM matrix, these new measurements, combined with the recent determinations of the angles α, β and γ from non-leptonic decays, allow, in the Standard Model, a quite accurate extraction of the values of the hadronic matrix elements relevant for K0-0 and Bs,d0-s,d0 mixing and of the leptonic decay constant fB. In this paper we upgrade the UT fit, we determine from the data the kaon B-parameter K, the B0 mixing amplitude parameters fBs 1/2Bs and ξ, the decay constant fB, and make a comparison of the obtained values with lattice predictions. We also discuss the different determinations of Vub and show that current data do not favour the value measured in inclusive decays.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/8ccacecc32af2ea8fc3e346855d6fb000a7d52d0
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In Nuclear and High Energy Physics
- David M. Straub
- A. Pich
- Aoife Bharucha
- R. Zwicky
- Marco Ciuchini
- L. Silvestrini
- V. Lubicz
- V. Cirigliano
Citations in the corpus
- Model-independent constraints on ΔF = 2 operators and the scale of new physics (2007, result): “The results for ρ̄ and η̄ reported in table 3 are at a level of accuracy comparable to the SM fit [42], so that the SM contribution to FCNC processes in the presence of arbitrary NP is bound to lie very close to the results of the SM in the absence of NP.”
- B →Vℓ+ℓ− in the Standard Model from light-cone sum rules (2015, background): “Figure 4: Our predictions for |Vub| from B → ρ`ν and B → ω`ν (blue) compared to global fits to Vub from exclusive [80] and inclusive channels [89] and indirect determinations from fits of the unitarity triangle [93,94].”