New determination of double-β-decay properties in 48Ca: High-precision Qββ
-value measurement and improved nuclear matrix element calculations

Kwiatkowski, A.A.; Brunner, T.; Holt, J.D.; Chaudhuri, A.; Chowdhury, U.; Eibach, M.; Engel, J.; Gallant, A.T.; Grossheim, A.; Horoi, M.; Lennarz, A.; Macdonald, T.D.; Pearson, M.R.; Schultz, B.E.; Simon, M.C.; Senkov, R.A.; Simon, Vanessa V.; Zuber, K.; Dilling, J.

doi:10.1103/PhysRevC.89.045502

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New determination of double-β-decay properties in ⁴⁸Ca: High-precision Q_ββ-value measurement and improved nuclear matrix element calculations

Kwiatkowski, A., Brunner, T., Holt, J., Chaudhuri, A., Chowdhury, U., Eibach, M., et al. (2014). New determination of double-β-decay properties in ⁴⁸Ca: High-precision Q_ββ-value measurement and improved nuclear matrix element calculations. Physical Review C, 89(4): 045502. doi:10.1103/PhysRevC.89.045502.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0018-E673-5 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0018-E678-C

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http://dx.doi.org/10.1103/PhysRevC.89.045502 (Publisher version) Open Access status unknown

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Kwiatkowski, A.A.¹, Author
Brunner, T.¹, Author
Holt, J.D.^{2, 3}, Author
Chaudhuri, A.¹, Author
Chowdhury, U.^{1, 4}, Author
Eibach, M.^{5, 6}, Author
Engel, J.⁷, Author
Gallant, A.T.^{1, 8}, Author
Grossheim, A.¹, Author
Horoi, M.⁹, Author
Lennarz, A.^{1, 10}, Author
Macdonald, T.D.^{1, 8}, Author
Pearson, M.R.¹, Author
Schultz, B.E.¹, Author
Simon, M.C.¹, Author
Senkov, R.A.⁹, Author
Simon, Vanessa V.^{1, 6, 11}, Author
Zuber, K.¹², Author
Dilling, J.^{1, 8}, Author

Affiliations:
1TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada, ou_persistent22
2Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany, ou_persistent22
3ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany, ou_persistent22
4Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada, ou_persistent22
5Institut für Kernchemie, Johannes Gutenberg-Universität, 55128 Mainz, Germany, ou_persistent22
6Fakultät für Physik und Astronomie, Ruprecht-Karls-Universität, 69120 Heidelberg, Germany, ou_persistent22
7Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599, USA, ou_persistent22
8Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada, ou_persistent22
9Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA, ou_persistent22
10Institut für Kernphysik, Westfälische Wilhelms-Universität, 48149 Münster, Germany, ou_persistent22
11Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548
12Institiut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany, ou_persistent22

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MPINP: Präzisionsexperimente - Abteilung Blaum

Abstract: We report a direct measurement of the Q_ββ value of the neutrinoless double-β-decay candidate ⁴⁸Ca at the TITAN Penning-trap mass spectrometer, with the result that the Q_ββ =4267.98(32)keV. We measured the masses of both the mother and daughter nuclides, and in the latter case found a 1 keV deviation from the literature value. In addition to the the Q_ββ value, we also present results of a new calculation of the neutrinoless double-β-decay nuclear matrix element of ⁴⁸Ca. Using diagrammatic many-body perturbation theory to second order to account for physics outside the valence space, we constructed an effective shell-model double-β-decay operator, which increased the nuclear matrix element by about 75% compared with that produced by the bare operator. The new the Q_ββ value and matrix element strengthen the case for a ⁴⁸Ca double-β-decay experiment.

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Language(s): eng - English

Dates: Date issued: 2014-04-09

Publication Status: Issued

Pages: 5

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Rev. Type: Peer

Identifiers: DOI: 10.1103/PhysRevC.89.045502

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Title: Physical Review C

Other : Phys. Rev. C

Source Genre: Journal

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Publ. Info: New York, NY : American Physical Society

Pages: - Volume / Issue: 89 (4) Sequence Number: 045502 Start / End Page: - Identifier: ISSN: 0556-2813
CoNE: https://pure.mpg.de/cone/journals/resource/954925225009