Unified framework for B-anomalies, muon g – 2 and neutrino masses
Abstract
We present a model of radiative neutrino masses which also resolves anomalies reported in B-meson decays, \( {R}_{D^{\left(\ast \right)}} \) and \( {R}_{K^{\left(\ast \right)}} \), as well as in muon g – 2 measurement, Δaμ. Neutrino masses arise in the model through loop diagrams involving TeV-scale leptoquark (LQ) scalars R2 and S3. Fits to neutrino oscillation parameters are obtained satisfying all flavor constraints which also explain the anomalies in \( {R}_{D^{\left(\ast \right)}} \), \( {R}_{K^{\left(\ast \right)}} \) and Δaμ within 1 σ. An isospin-3/2 Higgs quadruplet plays a crucial role in generating neutrino masses; we point out that the doubly-charged scalar contained therein can be produced in the decays of the S3 LQ, which enhances its reach to 1.1 (6.2) TeV at \( \sqrt{s} \) = 14 TeV high-luminosity LHC (\( \sqrt{s} \) = 100 TeV FCC-hh). We also present flavor-dependent upper limits on the Yukawa couplings of the LQs to the first two family fermions, arising from non-resonant dilepton (pp → ℓ+ℓ–) processes mediated by t-channel LQ exchange, which for 1 TeV LQ mass, are found to be in the range (0.15 – 0.36). These limits preclude any explanation of \( {R}_{D^{\left(\ast \right)}} \) through LQ-mediated B-meson decays involvingmore »
- Authors:
-
- Oklahoma State Univ., Stillwater, OK (United States). Dept. of Physics
- Washington Univ., St. Louis, MO (United States). Dept. of Physics
- Max Planck Inst. fuer Kernphysik, Heidelberg (Germany)
- Publication Date:
- Research Org.:
- Oklahoma State Univ., Stillwater, OK (United States); Washington Univ., St. Louis, MO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1852080
- Grant/Contract Number:
- SC0016013; SC0017987; AC02-07CHI11359
- 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: 2021; Journal Issue: 3; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Nature
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; physics; beyond standard model; Higgs physics; neutrino physics
Citation Formats
Babu, K. S., Dev, P. S. Bhupal, Jana, Sudip, and Thapa, Anil. Unified framework for B-anomalies, muon g – 2 and neutrino masses. United States: N. p., 2021.
Web. doi:10.1007/jhep03(2021)179.
Babu, K. S., Dev, P. S. Bhupal, Jana, Sudip, & Thapa, Anil. Unified framework for B-anomalies, muon g – 2 and neutrino masses. United States. https://doi.org/10.1007/jhep03(2021)179
Babu, K. S., Dev, P. S. Bhupal, Jana, Sudip, and Thapa, Anil. Thu .
"Unified framework for B-anomalies, muon g – 2 and neutrino masses". United States. https://doi.org/10.1007/jhep03(2021)179. https://www.osti.gov/servlets/purl/1852080.
@article{osti_1852080,
title = {Unified framework for B-anomalies, muon g – 2 and neutrino masses},
author = {Babu, K. S. and Dev, P. S. Bhupal and Jana, Sudip and Thapa, Anil},
abstractNote = {We present a model of radiative neutrino masses which also resolves anomalies reported in B-meson decays, \( {R}_{D^{\left(\ast \right)}} \) and \( {R}_{K^{\left(\ast \right)}} \), as well as in muon g – 2 measurement, Δaμ. Neutrino masses arise in the model through loop diagrams involving TeV-scale leptoquark (LQ) scalars R2 and S3. Fits to neutrino oscillation parameters are obtained satisfying all flavor constraints which also explain the anomalies in \( {R}_{D^{\left(\ast \right)}} \), \( {R}_{K^{\left(\ast \right)}} \) and Δaμ within 1 σ. An isospin-3/2 Higgs quadruplet plays a crucial role in generating neutrino masses; we point out that the doubly-charged scalar contained therein can be produced in the decays of the S3 LQ, which enhances its reach to 1.1 (6.2) TeV at \( \sqrt{s} \) = 14 TeV high-luminosity LHC (\( \sqrt{s} \) = 100 TeV FCC-hh). We also present flavor-dependent upper limits on the Yukawa couplings of the LQs to the first two family fermions, arising from non-resonant dilepton (pp → ℓ+ℓ–) processes mediated by t-channel LQ exchange, which for 1 TeV LQ mass, are found to be in the range (0.15 – 0.36). These limits preclude any explanation of \( {R}_{D^{\left(\ast \right)}} \) through LQ-mediated B-meson decays involving νe or νμ in the final state. We also find that the same Yukawa couplings responsible for the chirally-enhanced contribution to Δaμ give rise to new contributions to the SM Higgs decays to muon and tau pairs, with the modifications to the corresponding branching ratios being at (2–6)% level, which could be tested at future hadron colliders, such as HL-LHC and FCC-hh.},
doi = {10.1007/jhep03(2021)179},
journal = {Journal of High Energy Physics (Online)},
number = 3,
volume = 2021,
place = {United States},
year = {Thu Mar 18 00:00:00 EDT 2021},
month = {Thu Mar 18 00:00:00 EDT 2021}
}
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