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Title: It’s all right(-handed neutrinos): a new W ' model for the R D ( ) anomaly

Abstract

The measured B-meson semi-leptonic branching ratios R D and R D have long-standing deviations between theory and experiment. We introduce a model which explains both anomalies through a single interaction by introducing a right-handed neutrino as the missing energy particle. This interaction is mediated by a heavy charged vector boson (W ') which couples only to right-handed quarks and leptons of the Standard Model through the mixing of these particles with new vector-like fermions. Previous W ' models for the R D ( ) anomaly were strongly constrained from flavor changing neutral currents and direct collider searches for Z' → τ τ resonances. We show that relying on right-handed fermion mixing enables us to avoid these constraints, as well as other severe bounds from electroweak precision tests and neutrino mixing.

Authors:
ORCiD logo [1];  [2];  [2]
  1. Rutgers Univ., Piscataway, NJ (United States). NHETC. Dept. of Physics and Astronomy; Univ. of California, Santa Barbara, CA (United States). Kavli Inst. for Theoretical Physics
  2. Rutgers Univ., Piscataway, NJ (United States). NHETC. Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Rutgers Univ., Piscataway, NJ (United States); Univ. of California, Santa Barbara, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Simons Foundation (United States); Gordon and Betty Moore Foundation (United States); National Science Foundation (NSF)
OSTI Identifier:
1502358
Grant/Contract Number:  
SC0010008; SC0017811; 216179; 4310; PHY17-48958
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 9; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; heavy quark physics

Citation Formats

Asadi, Pouya, Buckley, Matthew R., and Shih, David. It’s all right(-handed neutrinos): a new W ' model for the R D ( ∗ ) anomaly. United States: N. p., 2018. Web. doi:10.1007/jhep09(2018)010.
Asadi, Pouya, Buckley, Matthew R., & Shih, David. It’s all right(-handed neutrinos): a new W ' model for the R D ( ∗ ) anomaly. United States. doi:10.1007/jhep09(2018)010.
Asadi, Pouya, Buckley, Matthew R., and Shih, David. Mon . "It’s all right(-handed neutrinos): a new W ' model for the R D ( ∗ ) anomaly". United States. doi:10.1007/jhep09(2018)010. https://www.osti.gov/servlets/purl/1502358.
@article{osti_1502358,
title = {It’s all right(-handed neutrinos): a new W ' model for the R D ( ∗ ) anomaly},
author = {Asadi, Pouya and Buckley, Matthew R. and Shih, David},
abstractNote = {The measured B-meson semi-leptonic branching ratios RD and R D ∗ have long-standing deviations between theory and experiment. We introduce a model which explains both anomalies through a single interaction by introducing a right-handed neutrino as the missing energy particle. This interaction is mediated by a heavy charged vector boson (W ') which couples only to right-handed quarks and leptons of the Standard Model through the mixing of these particles with new vector-like fermions. Previous W ' models for the R D ( ∗ ) anomaly were strongly constrained from flavor changing neutral currents and direct collider searches for Z' → τ τ resonances. We show that relying on right-handed fermion mixing enables us to avoid these constraints, as well as other severe bounds from electroweak precision tests and neutrino mixing.},
doi = {10.1007/jhep09(2018)010},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2018,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 24 works
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Figures / Tables:

Figure 1 Figure 1: The generic diagrams that contribute to RD and RD∗ by modifying b→more » $cτν$ amplitudes with a BSM mediator. The mediator can be one of the three candidates indicated in the text: (a) charged Higgs or $W$$′$; or (b) leptoquarks.« less

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