Nuclear Matrix Elements for Neutrinoless Double Beta Decay from Lattice QCD
© Copyright owned by the author(s) under the terms of the Creative Commons. While neutrino oscillation experiments have demonstrated that neutrinos have small, nonzero masses, much remains unknown about their properties and decay modes. One potential decay mode — neutrinoless double beta decay (0νββ...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sissa Medialab
2021
|
| Online Access: | https://hdl.handle.net/1721.1/132500 |
| _version_ | 1826194610552045568 |
|---|---|
| author | Murphy, David Detmold, William |
| author_facet | Murphy, David Detmold, William |
| author_sort | Murphy, David |
| collection | MIT |
| description | © Copyright owned by the author(s) under the terms of the Creative Commons. While neutrino oscillation experiments have demonstrated that neutrinos have small, nonzero masses, much remains unknown about their properties and decay modes. One potential decay mode — neutrinoless double beta decay (0νββ) — is a particularly interesting target of experimental searches, since its observation would imply that the neutrino is a Majorana particle, demonstrate that lepton number conservation is violated in nature, and give further constraints on the neutrino masses and mixing angles. Relating experimental constraints on 0νββ decay rates to the neutrino masses, however, requires theoretical input in the form of non-perturbative nuclear matrix elements which remain difficult to calculate reliably. In this talk we will discuss progress towards first-principles calculations of relevant nuclear matrix elements using lattice QCD and effective field theory techniques, assuming neutrinoless double beta decay mediated by a light Majorana neutrino. We will show preliminary results for the π− → π+e−e− transition amplitude computed on a 163 ×32 domain wall fermion lattice with a pion mass of 420 MeV, and discuss improved methods applicable to general lattice calculations of 0νββ decay amplitudes. |
| first_indexed | 2024-09-23T09:58:56Z |
| format | Article |
| id | mit-1721.1/132500 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:58:56Z |
| publishDate | 2021 |
| publisher | Sissa Medialab |
| record_format | dspace |
| spelling | mit-1721.1/1325002021-09-21T03:53:31Z Nuclear Matrix Elements for Neutrinoless Double Beta Decay from Lattice QCD Murphy, David Detmold, William © Copyright owned by the author(s) under the terms of the Creative Commons. While neutrino oscillation experiments have demonstrated that neutrinos have small, nonzero masses, much remains unknown about their properties and decay modes. One potential decay mode — neutrinoless double beta decay (0νββ) — is a particularly interesting target of experimental searches, since its observation would imply that the neutrino is a Majorana particle, demonstrate that lepton number conservation is violated in nature, and give further constraints on the neutrino masses and mixing angles. Relating experimental constraints on 0νββ decay rates to the neutrino masses, however, requires theoretical input in the form of non-perturbative nuclear matrix elements which remain difficult to calculate reliably. In this talk we will discuss progress towards first-principles calculations of relevant nuclear matrix elements using lattice QCD and effective field theory techniques, assuming neutrinoless double beta decay mediated by a light Majorana neutrino. We will show preliminary results for the π− → π+e−e− transition amplitude computed on a 163 ×32 domain wall fermion lattice with a pion mass of 420 MeV, and discuss improved methods applicable to general lattice calculations of 0νββ decay amplitudes. 2021-09-20T18:22:44Z 2021-09-20T18:22:44Z 2020-10-20T16:41:25Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132500 en 10.22323/1.334.0262 Proceedings of Science Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Sissa Medialab Proceedings of Science |
| spellingShingle | Murphy, David Detmold, William Nuclear Matrix Elements for Neutrinoless Double Beta Decay from Lattice QCD |
| title | Nuclear Matrix Elements for Neutrinoless Double Beta Decay from Lattice QCD |
| title_full | Nuclear Matrix Elements for Neutrinoless Double Beta Decay from Lattice QCD |
| title_fullStr | Nuclear Matrix Elements for Neutrinoless Double Beta Decay from Lattice QCD |
| title_full_unstemmed | Nuclear Matrix Elements for Neutrinoless Double Beta Decay from Lattice QCD |
| title_short | Nuclear Matrix Elements for Neutrinoless Double Beta Decay from Lattice QCD |
| title_sort | nuclear matrix elements for neutrinoless double beta decay from lattice qcd |
| url | https://hdl.handle.net/1721.1/132500 |
| work_keys_str_mv | AT murphydavid nuclearmatrixelementsforneutrinolessdoublebetadecayfromlatticeqcd AT detmoldwilliam nuclearmatrixelementsforneutrinolessdoublebetadecayfromlatticeqcd |