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Title: New Leading Contribution to Neutrinoless Double- β Decay

Journal Article · · Physical Review Letters

Within the framework of chiral effective field theory, we discuss the leading contributions to the neutrinoless double-beta decay transition operator induced by light Majorana neutrinos. Based on renormalization arguments in both dimensional regularization with minimal subtraction and a coordinate-space cutoff scheme, we show the need to introduce a leading-order short-range operator, missing in all current calculations. We discuss strategies to determine the finite part of the short-range coupling by matching to lattice QCD or by relating it via chiral symmetry to isospin-breaking observables in the two-nucleon sector. Lastly, we speculate on the impact of this new contribution on nuclear matrix elements of relevance to experiment.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
FG02-04ER41338; AC52-06NA25396
OSTI ID:
1437329
Alternate ID(s):
OSTI ID: 1480024
Report Number(s):
LA-UR-18-21404; PRLTAO; 202001
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Vol. 120 Journal Issue: 20; ISSN 0031-9007
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 75 works
Citation information provided by
Web of Science

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  • Pieper, Steven C.; Sakai, Hideyuki; Sekiguchi, Kimiko
  • POLARIZED ANTIPROTON BEAMS - HOW: An International Workshop, AIP Conference Proceedings https://doi.org/10.1063/1.2932280
conference January 2008

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Branching ratios for de-excitation processes of daughter nuclei following invisible dinucleon decays in 16 O journal September 2018

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