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dc.contributor.authorLeder, A. F.
dc.contributor.authorMayer, D.
dc.contributor.authorOuellet, J. L.
dc.contributor.authorDanevich, F. A.
dc.contributor.authorDumoulin, L.
dc.contributor.authorGiuliani, A.
dc.contributor.authorKostensalo, J.
dc.contributor.authorKotila, J.
dc.contributor.authorde Marcillac, P.
dc.contributor.authorNones, C.
dc.contributor.authorNovati, V.
dc.contributor.authorOlivieri, E.
dc.contributor.authorPoda, D.
dc.contributor.authorSuhonen, J.
dc.contributor.authorTretyak, V. I.
dc.contributor.authorWinslow, L.
dc.contributor.authorZolotarova, A.
dc.identifier.citationLeder, A. F., Mayer, D., Ouellet, J. L., Danevich, F. A., Dumoulin, L., Giuliani, A., Kostensalo, J., Kotila, J., de Marcillac, P., Nones, C., Novati, V., Olivieri, E., Poda, D., Suhonen, J., Tretyak, V. I., Winslow, L., & Zolotarova, A. (2022). Determining gA/gV with High-Resolution Spectral Measurements Using a LiInSe2 Bolometer. <i>Physical Review Letters</i>, <i>129</i>(23), Article 232502. <a href="" target="_blank"></a>
dc.description.abstractNeutrinoless double beta decay (0νββ) processes sample a wide range of intermediate forbidden nuclear transitions, which may be impacted by quenching of the axial vector coupling constant (gA/gV), the uncertainty of which plays a pivotal role in determining the sensitivity reach of 0νββ experiments. In this Letter, we present measurements performed on a high-resolution LiInSe2 bolometer in a “source = detector” configuration to measure the spectral shape of the fourfold forbidden β decay of 115In. The value of gA/gV is determined by comparing the spectral shape of theoretical predictions to the experimental β spectrum taking into account various simulated background components as well as a variety of detector effects. We find evidence of quenching of gA/gV at >5σ with a model-dependent quenching factor of 0.655±0.002 as compared to the free-nucleon value for the interacting shell model. We also measured the 115In half-life to be [5.18±0.06(stat)+0.005−0.015(sys)]×1014 yr within the interacting shell model framework. This Letter demonstrates the power of the bolometeric technique to perform precision nuclear physics single-β decay measurements, which along with improved nuclear modeling can help reduce the uncertainties in the calculation of several decay nuclear matrix elements including those used in 0νββ sensitivity calculations.en
dc.publisherAmerican Physical Society (APS)
dc.relation.ispartofseriesPhysical Review Letters
dc.rightsIn Copyright
dc.titleDetermining gA/gV with High-Resolution Spectral Measurements Using a LiInSe2 Bolometer
dc.contributor.laitosKoulutuksen tutkimuslaitosfi
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosFinnish Institute for Educational Researchen
dc.contributor.laitosDepartment of Physicsen
dc.rights.copyright© 2022 American Physical Society
dc.relation.funderResearch Council of Finlanden
dc.relation.funderResearch Council of Finlanden
dc.relation.funderResearch Council of Finlanden
dc.relation.funderSuomen Akatemiafi
dc.relation.funderSuomen Akatemiafi
dc.relation.funderSuomen Akatemiafi
jyx.fundingprogramAcademy Research Fellow, AoFen
jyx.fundingprogramResearch costs of Academy Research Fellow, AoFen
jyx.fundingprogramAcademy Project, AoFen
jyx.fundingprogramAkatemiatutkija, SAfi
jyx.fundingprogramAkatemiatutkijan tutkimuskulut, SAfi
jyx.fundingprogramAkatemiahanke, SAfi
jyx.fundinginformationThe dilution refrigerator used for the tests and installed at IJCLab (Orsay, France) was donated by the Dipartimento di Scienza e Alta Tecnologia of the Insubria University (Como, Italy). This work makes use of the diana data analysis and apollo data acquisition software which has been developed by the CUORICINO, CUORE, LUCIFER, CUPID-Mo, and CUPID-0 Collaborations. A. F. L. acknowledges the support of the California Alliance Fellowship. L. W. would like to acknowledge funding from Grant No. DE-SC0011091. J. K. would like to acknowledge funding from Academy of Finland Grants No. 314733 and No. 345869. This work has also been partially supported by the Academy of Finland under the Academy Project No. 318043. F. A. D. and V. I. T. were supported in part by the National Research Foundation of Ukraine Grant No. 2020.02/0011.

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