A theory of R(D*, D) anomaly with right-handed currents

被引：47

作者：

Babu, K. S. ^{[1
]}

Dutta, Bhaskar ^{[2
]}

Mohapatra, Rabindra N. ^{[3
]}

机构：

[1] Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA

[2] Texas A&M Univ, Dept Phys & Astron, Mitchell Inst Fundamental Phys & Astron, College Stn, TX 77845 USA

[3] Univ Maryland, Dept Phys, Maryland Ctr Fundamental Phys, College Pk, MD 20742 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2019年 / 2019卷 / 01期

基金：

美国国家科学基金会;

关键词：

Beyond Standard Model; Gauge Symmetry; Heavy Quark Physics; R-K; UNIVERSALITY VIOLATION; WEAK-INTERACTIONS; NEUTRINO MASSES; CP VIOLATION; B-DECAYS; LEPTOQUARK; SYMMETRY; MODELS; CONSTRAINTS;

D O I：

10.1007/JHEP01(2019)168

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We present an ultraviolet complete theory for the R(D-*) and R(D) anomaly in terms of a low mass W +/- gauge boson of a class of left-right symmetric models. These models, which are based on the gauge symmetry SU(3)(c) x SU(2)(L) x SU(2)(R) x U(1)(B - L), utilize vector-like fermions to generate quark and lepton masses via a universal seesaw mechanism. A parity symmetric version as well as an asymmetric version are studied. A light sterile neutrino emerges naturally in this setup, which allows for new decay modes of B-meson via right-handed currents. We show that these models can explain R(D-*) and R(D) anomaly while being consistent with LHC and LEP data as well as low energy flavor constraints arising from KL-KS,Bd,s-Bd,s,D- mixing, etc., but only for a limited range of the W-R mass: 1.2 (1.8) TeV MWR 3 TeV for parity asymmetric (symmetric) Yukawa sectors. The ratio R(D)/R(D-*) is predicted to be similar or equal to 1.16, which is the same as in the Standard Model. The light sterile neutrinos predicted by the model may be relevant for explaining the MiniBoone and LSND neutrino oscillation results. The parity symmetric version of the model provides a simple solution to the strong CP problem without relying on the axion. It also predicts an isospin singlet top partner with a mass M-T = (1.5 - 2.5) TeV.

引用

页数：44

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