Double-β decay matrix elements from lattice quantum chromodynamics
A lattice quantum chromodynamics (LQCD) calculation of the nuclear matrix element relevant to the nn→ppee[bar over ν]p[subscript e][bar over ν][subscript e] transition is described in detail, expanding on the results presented in Ref. [P. E. Shanahan et al., Phys. Rev. Lett. 119, 062003 (2017)]. Thi...
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| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/113348 https://orcid.org/0000-0002-1110-3633 |
| _version_ | 1826204074280747008 |
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| author | Tiburzi, Brian C. Wagman, Michael L. Winter, Frank Chang, Emmanuel Detmold, William Orginos, Kostas Savage, Martin J. Davoudi, Zohreh Shanahan, Phiala E |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Tiburzi, Brian C. Wagman, Michael L. Winter, Frank Chang, Emmanuel Detmold, William Orginos, Kostas Savage, Martin J. Davoudi, Zohreh Shanahan, Phiala E |
| author_sort | Tiburzi, Brian C. |
| collection | MIT |
| description | A lattice quantum chromodynamics (LQCD) calculation of the nuclear matrix element relevant to the nn→ppee[bar over ν]p[subscript e][bar over ν][subscript e] transition is described in detail, expanding on the results presented in Ref. [P. E. Shanahan et al., Phys. Rev. Lett. 119, 062003 (2017)]. This matrix element, which involves two insertions of the weak axial current, is an important input for phenomenological determinations of double-β decay rates of nuclei. From this exploratory study, performed using unphysical values of the quark masses, the long-distance deuteron-pole contribution to the matrix element is separated from shorter-distance hadronic contributions. This polarizability, which is only accessible in double-weak processes, cannot be constrained from single-β decay of nuclei, and is found to be smaller than the long-distance contributions in this calculation, but non-negligible. In this work, technical aspects of the LQCD calculations, and of the relevant formalism in the pionless effective field theory, are described. Further calculations of the isotensor axial polarizability, in particular near and at the physical values of the light-quark masses, are required for precise determinations of both two-neutrino and neutrinoless double-β decay rates in heavy nuclei. |
| first_indexed | 2024-09-23T12:48:30Z |
| format | Article |
| id | mit-1721.1/113348 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T12:48:30Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1133482022-10-01T11:13:03Z Double-β decay matrix elements from lattice quantum chromodynamics Tiburzi, Brian C. Wagman, Michael L. Winter, Frank Chang, Emmanuel Detmold, William Orginos, Kostas Savage, Martin J. Davoudi, Zohreh Shanahan, Phiala E Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Davoudi, Zohreh Shanahan, Phiala E A lattice quantum chromodynamics (LQCD) calculation of the nuclear matrix element relevant to the nn→ppee[bar over ν]p[subscript e][bar over ν][subscript e] transition is described in detail, expanding on the results presented in Ref. [P. E. Shanahan et al., Phys. Rev. Lett. 119, 062003 (2017)]. This matrix element, which involves two insertions of the weak axial current, is an important input for phenomenological determinations of double-β decay rates of nuclei. From this exploratory study, performed using unphysical values of the quark masses, the long-distance deuteron-pole contribution to the matrix element is separated from shorter-distance hadronic contributions. This polarizability, which is only accessible in double-weak processes, cannot be constrained from single-β decay of nuclei, and is found to be smaller than the long-distance contributions in this calculation, but non-negligible. In this work, technical aspects of the LQCD calculations, and of the relevant formalism in the pionless effective field theory, are described. Further calculations of the isotensor axial polarizability, in particular near and at the physical values of the light-quark masses, are required for precise determinations of both two-neutrino and neutrinoless double-β decay rates in heavy nuclei. United States. Department of Energy (Early Career Research Award DE-SC0010495) United States. Department of Energy (Grant DE-SC0011090) 2018-01-30T16:30:44Z 2018-01-30T16:30:44Z 2017-09 2017-04 2017-11-14T22:46:11Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 http://hdl.handle.net/1721.1/113348 Tiburzi, Brian C., et al. “Double- β Decay Matrix Elements from Lattice Quantum Chromodynamics.” Physical Review D, vol. 96, no. 5, Sept. 2017. © 2017 American Physical Society https://orcid.org/0000-0002-1110-3633 en http://dx.doi.org/10.1103/PhysRevD.96.054505 Physical Review D Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Tiburzi, Brian C. Wagman, Michael L. Winter, Frank Chang, Emmanuel Detmold, William Orginos, Kostas Savage, Martin J. Davoudi, Zohreh Shanahan, Phiala E Double-β decay matrix elements from lattice quantum chromodynamics |
| title | Double-β decay matrix elements from lattice quantum chromodynamics |
| title_full | Double-β decay matrix elements from lattice quantum chromodynamics |
| title_fullStr | Double-β decay matrix elements from lattice quantum chromodynamics |
| title_full_unstemmed | Double-β decay matrix elements from lattice quantum chromodynamics |
| title_short | Double-β decay matrix elements from lattice quantum chromodynamics |
| title_sort | double β decay matrix elements from lattice quantum chromodynamics |
| url | http://hdl.handle.net/1721.1/113348 https://orcid.org/0000-0002-1110-3633 |
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