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Blanke, Monika; Crivellin, Andreas; Kitahara, Teppei; Moscati, Marta; Nierste, Ulrich; Nišandžić, Ivan
Physical review. D, 08/2019, Letnik: 100, Številka: 3Journal Article
In this addendum to Ref. 1, we update our results to include the recent measurement of R(D) and R(D*) by the Belle Collaboration 2: R(D)Belle=0.307±0.037±0.016 and R(D*)Belle=0.283±0.018±0.014, resulting in the new HFLAV fit result R(D)=0.340±0.027±0.013, R(D*)=0.295±0.011±0.008, exhibiting a 3.1σ tension with the Standard Model. We present the new fit results and update all figures, including the relevant new collider constraints. The updated prediction for R(Λc) from our sum rule reads R(Λc)=RSM(Λc)(1.15±0.04)=0.38±0.01±0.01. We also comment on theoretical predictions for the fragmentation function fc of b→Bc and their implication on the constraint from Bu/c→τν data.
