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

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [3]
  1. Oklahoma State Univ., Stillwater, OK (United States)
  2. Texas A & M Univ., College Station, TX (United States)
  3. Univ. of Maryland, College Park, MD (United States)

We present an ultraviolet complete theory for the R(D*) and R(D) anomaly in terms of a low mass W ± R gauge boson of a class of left-right symmetric models. These models, which are based on the gauge symmetry SU(3)c × SU(2)L × SU(2)R × 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 \( {K}_L-{K}_S,\kern0.5em {B}_{d,s}-{\overline{B}}_{d,s},\kern0.5em D-\overline{D} \) mixing, etc., but only for a limited range of the WR mass: 1.2 (1.8) TeV ≤ \( {M}_{W_R} \) ≤ 3 TeV for parity asymmetric (symmetric) Yukawa sectors. The ratio R(D)/R(D*) is predicted to be ≃ 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 MT = (1.5 - 2.5) TeV.

Research Organization:
Texas A & M Univ., College Station, TX (United States); Oklahoma State Univ., Stillwater, OK (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0010813; SC0016013
OSTI ID:
1611543
Journal Information:
Journal of High Energy Physics (Online), Vol. 2019, Issue 1; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Charged current b c τ ν ¯ τ anomalies in a general W boson scenario journal November 2019
Investigation of effects of new physics in Λ b Λ c τ ν ¯ τ decay journal December 2019

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