Journal
PHYSICAL REVIEW LETTERS
Volume 121, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.172501
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Funding
- Office of Science of the U.S. Department of Energy through an INCITE award [DE-AC05-00OR22725]
- NVIDIA Corporation (MAC)
- DFG
- NSFC
- RIKEN SPDR fellowship
- Leverhulme Trust
- U.S. Department of Energy, Office of Science: Office of Nuclear Physics
- Office of Advanced Scientific Computing
- Nuclear Physics Double Beta Decay Topical Collaboration
- DOE Early Career Award Program
- LLNL Livermore Graduate Scholar Program
- U.S. Department of Energy by LLNL [DE-AC52-07NA27344]
- U.S. Department of Energy by LBNL [DE-AC02-05CH11231]
- National Science Foundation [NSF PHY15-15738, NSF PHY-1748958]
- LLNL Multiprogrammatic and Institutional Computing program through a Tier 1 Grand Challenge award
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Observation of neutrinoless double beta decay, a lepton number violating process that has been proposed to clarify the nature of neutrino masses, has spawned an enormous world-wide experimental effort. Relating nuclear decay rates to high-energy, beyond the standard model (BSM) physics requires detailed knowledge of nonperturbative QCD effects. Using lattice QCD, we compute the necessary matrix elements of short-range operators, which arise due to heavy BSM mediators, that contribute to this decay via the leading order pi(-) -> pi(+) exchange diagrams. Utilizing our result and taking advantage of effective field theory methods will allow for model-independent calculations of the relevant two-nucleon decay, which may then be used as input for nuclear many-body calculations of the relevant experimental decays. Contributions from short-range operators may prove to be equally important to, or even more important than, those from long-range Majorana neutrino exchange.
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