Isotensor Axial Polarizability and Lattice QCD Input for Nuclear Double-β Decay Phenomenology
Author(s)
Tiburzi, Brian C.; Wagman, Michael L.; Winter, Frank; Chang, Emmanuel; Orginos, Kostas; Savage, Martin J.; Shanahan, Phiala E; Davoudi, Zohreh; Detmold, William; ... Show more Show less
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The potential importance of short-distance nuclear effects in double-β decay is assessed using a lattice QCD calculation of the nn→pp transition and effective field theory methods. At the unphysical quark masses used in the numerical computation, these effects, encoded in the isotensor axial polarizability, are found to be of similar magnitude to the nuclear modification of the single axial current, which phenomenologically is the quenching of the axial charge used in nuclear many-body calculations. This finding suggests that nuclear models for neutrinoful and neutrinoless double-β decays should incorporate this previously neglected contribution if they are to provide reliable guidance for next-generation neutrinoless double-β decay searches. The prospects of constraining the isotensor axial polarizabilities of nuclei using lattice QCD input into nuclear many-body calculations are discussed.
Date issued
2017-08Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of PhysicsJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Shanahan, Phiala E. et al. "Isotensor Axial Polarizability and Lattice QCD Input for Nuclear Double- β Decay Phenomenology." Physical Review Letters 119, 6 (August 2017): 062003 © 2017 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114