Impact of polarization observables and Bc → τν on new physics explanations of the b → cτν anomaly (vol 99, 075006, 2019)

被引：79

作者：

Blanke, Monika ^{[1
,2
]}

Crivellin, Andreas ^{[3
,4
]}

Kitahara, Teppei ^{[5
,6
,7
]}

Moscati, Marta ^{[2
]}

Nierste, Ulrich ^{[2
]}

Nisandzic, Ivan ^{[2
]}

机构：

[1] KIT, Inst Kernphys, D-76344 Eggenstein Leopoldshafen, Germany

[2] KIT, Inst Theoret Teilchenphys TTP, D-76131 Karlsruhe, Germany

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[4] Univ Zurich, Inst Phys, Winterthurerstr 190, CH-8057 Zurich, Switzerland

[5] Nagoya Univ, Inst Adv Res, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan

[6] Nagoya Univ, Kobayashi Maskawa Inst Origin Particles & Univers, Nagoya, Aichi 4648602, Japan

[7] Technion Israel Inst Technol, Dept Phys, IL-3200003 Haifa, Israel

来源：

PHYSICAL REVIEW D | 2019年 / 100卷 / 03期

基金：

瑞士国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.100.035035

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 3.1 sigma 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(Lambda(c)) from our sum rule reads R(Lambda(c)) = R-SM (Lambda(c)) (1.15 +/- 0.04) = 0.38 +/- 0.01 +/- 0.01. We also comment on theoretical predictions for the fragmentation function f(c) of b -> B-c and their implication on the constraint from B-u/c -> tau nu data.

引用

页数：9

共 30 条

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