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Title: Discovering leptonic forces using nonconserved currents

Abstract

Differences in lepton number (i.e., $$L_e–L_μ, L_e–L_τ, L_μ–L_τ$$, or combinations thereof) are not conserved charges in the Standard Model due to the observation of neutrino oscillations. We compute the divergence of the corresponding currents in the case of Majorana or Dirac-type neutrinos and show that, in the high energy limit, the vector interactions map onto those of a light scalar coupled to neutrinos with its coupling fixed by the observed neutrino masses and mixing. This leads to amplitudes with external light vectors that scale inversely with the vector mass. By studying these processes, we set new constraints on $$L_i–L_j$$ through a combination of semileptonic meson decays, invisible neutrino decays, neutrinoless double beta decays, and observations of big bang nucleosynthesis/supernova, which can be much stronger than previous limits for vector masses below an eV. These bounds have important implications on the experimental prospects of detecting $$L_i–L_j$$ long-range forces.

Authors:
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1618388
Alternate Identifier(s):
OSTI ID: 1737614
Grant/Contract Number:  
AC02-05CH11231; PHY-1748958
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 101 Journal Issue: 9; 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; extensions of gauge sector; hypothetical particle physics models; particle dark matter; hypothetical gauge bosons; Majorana neutrinos

Citation Formats

Dror, Jeff A. Discovering leptonic forces using nonconserved currents. United States: N. p., 2020. Web. doi:10.1103/physrevd.101.095013.
Dror, Jeff A. Discovering leptonic forces using nonconserved currents. United States. doi:https://doi.org/10.1103/physrevd.101.095013
Dror, Jeff A. Wed . "Discovering leptonic forces using nonconserved currents". United States. doi:https://doi.org/10.1103/physrevd.101.095013.
@article{osti_1618388,
title = {Discovering leptonic forces using nonconserved currents},
author = {Dror, Jeff A.},
abstractNote = {Differences in lepton number (i.e., $L_e–L_μ, L_e–L_τ, L_μ–L_τ$, or combinations thereof) are not conserved charges in the Standard Model due to the observation of neutrino oscillations. We compute the divergence of the corresponding currents in the case of Majorana or Dirac-type neutrinos and show that, in the high energy limit, the vector interactions map onto those of a light scalar coupled to neutrinos with its coupling fixed by the observed neutrino masses and mixing. This leads to amplitudes with external light vectors that scale inversely with the vector mass. By studying these processes, we set new constraints on $L_i–L_j$ through a combination of semileptonic meson decays, invisible neutrino decays, neutrinoless double beta decays, and observations of big bang nucleosynthesis/supernova, which can be much stronger than previous limits for vector masses below an eV. These bounds have important implications on the experimental prospects of detecting $L_i–L_j$ long-range forces.},
doi = {10.1103/physrevd.101.095013},
journal = {Physical Review D},
number = 9,
volume = 101,
place = {United States},
year = {2020},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: https://doi.org/10.1103/physrevd.101.095013

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Cited by: 1 work
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