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Addendum to “Impact of polarization observables and Bc→τν on new physics explanations of the b→cτν anomaly”


Blanke, Monika; Crivellin, Andreas; Kitahara, Teppei; Moscati, Marta; Nierste, Ulrich; Nišandžić, Ivan (2019). Addendum to “Impact of polarization observables and Bc→τν on new physics explanations of the b→cτν anomaly”. Physical review D, 100(3):035035.

Abstract

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.

Abstract

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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Uncontrolled Keywords:Physics and Astronomy (miscellaneous)
Language:English
Date:28 August 2019
Deposited On:12 Sep 2019 11:08
Last Modified:14 Feb 2020 08:28
Publisher:American Physical Society
ISSN:2470-0010
OA Status:Green
Publisher DOI:https://doi.org/10.1103/physrevd.100.035035
Project Information:
  • : FunderSNSF
  • : Grant IDPP00P2_176884
  • : Project TitleB Meson Decays and Lepton Flavour Universality Violation

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