Heavy Physics Contributions to Neutrinoless Double Beta Decay from QCD


Nicholson, A, Berkowitz, E, Monge-Camacho, H, Brantley, D, Garron, N ORCID: 0000-0002-4428-3984, Chang, CC, Rinaldi, E, Clark, MA, Joo, B, Kurth, T et al (show 3 more authors) (2018) Heavy Physics Contributions to Neutrinoless Double Beta Decay from QCD. PHYSICAL REVIEW LETTERS, 121 (17). 172501-.

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Abstract

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 π^{-}→π^{+} 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.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 07 Aug 2018 08:40
Last Modified: 19 Jan 2023 01:29
DOI: 10.1103/PhysRevLett.121.172501
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3024649
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