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Title: An electroweak basis for neutrinoless double β decay

Abstract

Here, a discovery of neutrinoless double-β decay would be profound, providing the first direct experimental evidence of ΔL = 2 lepton number violating processes. While a natural explanation is provided by an effective Majorana neutrino mass, other new physics interpretations should be carefully evaluated. At low-energies such new physics could man-ifest itself in the form of color and SU(2) L × U(1)Y invariant higher dimension operators. Here we determine a complete set of electroweak invariant dimension-9 operators, and our analysis supersedes those that only impose U(1) em invariance. Imposing electroweak invariance implies: 1) a significantly reduced set of leading order operators compared to only imposing U(1) em invariance; and 2) other collider signatures. Prior to imposing electroweak invariance we find a minimal basis of 24 dimension-9 operators, which is reduced to 11 electroweak invariant operators at leading order in the expansion in the Higgs vacuum expectation value. We set up a systematic analysis of the hadronic realization of the 4-quark operators using chiral perturbation theory, and apply it to determine which of these operators have long-distance pion enhancements at leading order in the chiral expansion. We also find at dimension-11 and dimension-13 the electroweak invariant operators that after electroweak symmetrymore » breaking produce the remaining ΔL = 2 operators that would appear at dimension-9 if only U(1) em is imposed.« less

Authors:
ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1398909
Report Number(s):
LA-UR-16-23550
Journal ID: ISSN 1029-8479
Grant/Contract Number:  
AC52-06NA25396
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: 2017; Journal Issue: 8; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Atomic and Nuclear Physics; Beyond Standard Model; Neutrino Physics; Chiral Lagrangians

Citation Formats

Graesser, Michael L. An electroweak basis for neutrinoless double β decay. United States: N. p., 2017. Web. doi:10.1007/JHEP08(2017)099.
Graesser, Michael L. An electroweak basis for neutrinoless double β decay. United States. doi:10.1007/JHEP08(2017)099.
Graesser, Michael L. Wed . "An electroweak basis for neutrinoless double β decay". United States. doi:10.1007/JHEP08(2017)099. https://www.osti.gov/servlets/purl/1398909.
@article{osti_1398909,
title = {An electroweak basis for neutrinoless double β decay},
author = {Graesser, Michael L.},
abstractNote = {Here, a discovery of neutrinoless double-β decay would be profound, providing the first direct experimental evidence of ΔL = 2 lepton number violating processes. While a natural explanation is provided by an effective Majorana neutrino mass, other new physics interpretations should be carefully evaluated. At low-energies such new physics could man-ifest itself in the form of color and SU(2)L × U(1)Y invariant higher dimension operators. Here we determine a complete set of electroweak invariant dimension-9 operators, and our analysis supersedes those that only impose U(1)em invariance. Imposing electroweak invariance implies: 1) a significantly reduced set of leading order operators compared to only imposing U(1)em invariance; and 2) other collider signatures. Prior to imposing electroweak invariance we find a minimal basis of 24 dimension-9 operators, which is reduced to 11 electroweak invariant operators at leading order in the expansion in the Higgs vacuum expectation value. We set up a systematic analysis of the hadronic realization of the 4-quark operators using chiral perturbation theory, and apply it to determine which of these operators have long-distance pion enhancements at leading order in the chiral expansion. We also find at dimension-11 and dimension-13 the electroweak invariant operators that after electroweak symmetry breaking produce the remaining ΔL = 2 operators that would appear at dimension-9 if only U(1)em is imposed.},
doi = {10.1007/JHEP08(2017)099},
journal = {Journal of High Energy Physics (Online)},
number = 8,
volume = 2017,
place = {United States},
year = {2017},
month = {8}
}

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Works referenced in this record:

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    Works referencing / citing this record:

    Neutrinoless double beta decay and chiral SU (3)
    journal, June 2017


    Cosmological implications of lepton number violation
    journal, November 2018


    Two-component spinor techniques and Feynman rules for quantum field theory and supersymmetry
    journal, September 2010


    Double Beta Decay
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    • Doi, M.; Kotani, T.; Nishiura, H.
    • Progress of Theoretical Physics, Vol. 69, Issue 2
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    LHC dijet constraints on double beta decay
    journal, October 2015


    Neutrinos and collider physics
    journal, July 2015


    Power corrections at short distances
    journal, January 1980


    Probing new physics models of neutrinoless double beta decay with SuperNEMO
    journal, November 2010


    Scalar-mediated double beta decay and LHC
    journal, December 2016

    • Gonzalez, L.; Helo, J. C.; Hirsch, M.
    • Journal of High Energy Physics, Vol. 2016, Issue 12
    • DOI: 10.1007/jhep12(2016)130

    Probing nonstandard standard model backgrounds with LHC monojets
    journal, August 2012


    Neutrinoless ββ decay and a new limit on the right-handed current
    journal, May 1986


    Cosmological implications of lepton number violation
    journal, November 2018