Dipole portal to heavy neutral leptons
Abstract
We consider generic neutrino dipole portals between left-handed neutrinos, photons, and right-handed heavy neutral leptons (HNL) with Dirac masses. The dominance of this portal significantly alters the conventional phenomenology of HNLs. We derive a comprehensive set of constraints on the dipole portal to HNLs by utilizing data from LEP, LHC, MiniBooNE, LSND as well as observations of Supernova 1987A and consistency of the standard big bang nucleosynthesis. We calculate projected sensitivities from the proposed high-intensity SHiP beam dump experiment, and the ongoing experiments at the Short-Baseline Neutrino facility at Fermilab. Dipole mediated Primakoff neutrino upscattering and Dalitz-like meson decays are found to be the main production mechanisms in most of the parametric regime under consideration. In conclusion, proposed explanations of LSND and MiniBooNE anomalies based on HNLs with dipole-induced decays are found to be severely constrained, or to be tested in the future experiments.
- Authors:
- Perimeter Institute for Theoretical Physics, Waterloo, ON (Canada); McMaster Univ., Hamilton, ON (Canada)
- Perimeter Institute for Theoretical Physics, Waterloo, ON (Canada); Univ. of Victoria, Victoria, BC (Canada); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- OSTI Identifier:
- 1497099
- Report Number(s):
- arXiv:1803.03262; FERMILAB-PUB-18-745-A
Journal ID: ISSN 2470-0010; PRVDAQ; 1659293
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 11; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Magill, Gabriel, Plestid, Ryan, Pospelov, Maxim, and Tsai, Yu -Dai. Dipole portal to heavy neutral leptons. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.98.115015.
Magill, Gabriel, Plestid, Ryan, Pospelov, Maxim, & Tsai, Yu -Dai. Dipole portal to heavy neutral leptons. United States. doi:10.1103/PhysRevD.98.115015.
Magill, Gabriel, Plestid, Ryan, Pospelov, Maxim, and Tsai, Yu -Dai. Tue .
"Dipole portal to heavy neutral leptons". United States. doi:10.1103/PhysRevD.98.115015. https://www.osti.gov/servlets/purl/1497099.
@article{osti_1497099,
title = {Dipole portal to heavy neutral leptons},
author = {Magill, Gabriel and Plestid, Ryan and Pospelov, Maxim and Tsai, Yu -Dai},
abstractNote = {We consider generic neutrino dipole portals between left-handed neutrinos, photons, and right-handed heavy neutral leptons (HNL) with Dirac masses. The dominance of this portal significantly alters the conventional phenomenology of HNLs. We derive a comprehensive set of constraints on the dipole portal to HNLs by utilizing data from LEP, LHC, MiniBooNE, LSND as well as observations of Supernova 1987A and consistency of the standard big bang nucleosynthesis. We calculate projected sensitivities from the proposed high-intensity SHiP beam dump experiment, and the ongoing experiments at the Short-Baseline Neutrino facility at Fermilab. Dipole mediated Primakoff neutrino upscattering and Dalitz-like meson decays are found to be the main production mechanisms in most of the parametric regime under consideration. In conclusion, proposed explanations of LSND and MiniBooNE anomalies based on HNLs with dipole-induced decays are found to be severely constrained, or to be tested in the future experiments.},
doi = {10.1103/PhysRevD.98.115015},
journal = {Physical Review D},
number = 11,
volume = 98,
place = {United States},
year = {2018},
month = {12}
}
Web of Science
Figures / Tables:

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