Addendum to ``Impact of polarization observables and ${B}_{c}\ensuremath{\rightarrow}\ensuremath{\tau}\ensuremath{\nu}$ on new physics explanations of the $b\ensuremath{\rightarrow}c\ensuremath{\tau}\ensuremath{\nu}$ anomaly''

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Addendum to “Impact of polarization observables and $B_{c} \to τ ν$ on new physics explanations of the $b \to c τ ν$ anomaly”

Monika Blanke, Andreas Crivellin, Teppei Kitahara, Marta Moscati, Ulrich Nierste, and Ivan Nišandžić

Phys. Rev. D 100, 035035 – Published 28 August 2019

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]: $R (D)_{Belle} = 0.307 \pm 0.037 \pm 0.016$ and $R (D^{*})_{Belle} = 0.283 \pm 0.018 \pm 0.014$ , resulting in the new HFLAV fit result $R (D) = 0.340 \pm 0.027 \pm 0.013$ , $R (D^{*}) = 0.295 \pm 0.011 \pm 0.008$ , exhibiting a $3.1 σ$ 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 $R (Λ_{c})$ from our sum rule reads $R (Λ_{c}) = R_{SM} (Λ_{c}) (1.15 \pm 0.04) = 0.38 \pm 0.01 \pm 0.01$ . We also comment on theoretical predictions for the fragmentation function $f_{c}$ of $b \to B_{c}$ and their implication on the constraint from $B_{u / c} \to τ ν$ data.

Received 27 May 2019

DOI:https://doi.org/10.1103/PhysRevD.100.035035

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Leptonic, semileptonic & radiative decays

Particles & Fields

Authors & Affiliations

Monika Blanke^*

Institut für Kernphysik, Karlsruher Institut für Technologie (KIT), 76344 Eggenstein-Leopoldshafen, Germany and Institut für Theoretische Teilchenphysik (TTP), Karlsruher Institut für Technologie (KIT), 76131 Karlsruhe, Germany

Andreas Crivellin^†

Paul Scherrer Institut, CH–5232 Villigen PSI, Switzerland and Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH–8057 Zürich, Switzerland

Teppei Kitahara^‡

Institute for Advanced Research, Nagoya University, Furo-cho Chikusa-ku, Nagoya, 464-8602 Japan; Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya 464-8602, Japan; and Physics Department, Technion–Israel Institute of Technology, Haifa 3200003, Israel

Marta Moscati^§, Ulrich Nierste^∥, and Ivan Nišandžić^¶

Institut für Theoretische Teilchenphysik (TTP), Karlsruher Institut für Technologie (KIT), 76131 Karlsruhe, Germany

^*monika.blanke@kit.edu
^†andreas.crivellin@cern.ch
^‡teppeik@kmi.nagoya-u.ac.jp
^§marta.moscati@kit.edu
^∥ulrich.nierste@kit.edu
^¶ivan.nisandzic@kit.edu

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Vol. 100, Iss. 3 — 1 August 2019

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Physical Review D

covering particles, fields, gravitation, and cosmology

Addendum to “Impact of polarization observables and $B_{c} \to τ ν$ on new physics explanations of the $b \to c τ ν$ anomaly”

Monika Blanke, Andreas Crivellin, Teppei Kitahara, Marta Moscati, Ulrich Nierste, and Ivan Nišandžić

Phys. Rev. D 100, 035035 – Published 28 August 2019

Abstract

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Physical Review D

covering particles, fields, gravitation, and cosmology

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

Monika Blanke, Andreas Crivellin, Teppei Kitahara, Marta Moscati, Ulrich Nierste, and Ivan Nišandžić

Phys. Rev. D 100, 035035 – Published 28 August 2019

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Addendum to “Impact of polarization observables and $B_{c} \to τ ν$ on new physics explanations of the $b \to c τ ν$ anomaly”