Flavor models for (B)over-bar → D(*)τ(ν)over-bar

被引：254

作者：

Freytsis, Marat ^{[1
]}

Ligeti, Zoltan ^{[2
]}

Ruderman, Joshua T. ^{[3
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[3] NYU, Dept Phys, Ctr Cosmol & Particle Phys, New York, NY 10003 USA

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 05期

基金：

美国国家科学基金会;

关键词：

CONSTRAINTS; SEARCH; DECAY; QUARK; LEPTOQUARKS; COLLISIONS; VIOLATION; SCALAR; W';

D O I：

10.1103/PhysRevD.92.054018

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The ratio of the measured (B) over bar -> D-(*())l (nu) over bar decay rates for l = tau vs e, mu deviate from the standard model (SM) by about 4 sigma. We show that the data are in tension with the SM, independent of form factor calculations, and we update the SM prediction for B(B -> X-c tau(nu) over bar)/B(B -> X(c)l (nu) over bar). We classify the operators that can accommodate the measured central values, as well as their UV completions. We identify models with leptoquark mediators that are minimally flavor violating in the quark sector, and are minimally flavor violating or tau-aligned in the lepton sector. We explore experimental signatures of these scenarios, which are observable in the future at ATLAS/CMS, LHCb, or Belle II.

引用

页数：13

共 50 条

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