Double-weak decays of 124Xe and 136Xe in the XENON1T and XENONnT experiments
| dc.citation.articleNumber | 024328 | |
| dc.citation.issueNumber | 2 | |
| dc.citation.journalTitle | Physical Review C | |
| dc.citation.volumeNumber | 106 | |
| dc.contributor.author | XENON Collaboration | |
| dc.date.accessioned | 2022-10-28T17:43:01Z | |
| dc.date.available | 2022-10-28T17:43:01Z | |
| dc.date.issued | 2022 | |
| dc.description.abstract | We present results on the search for two-neutrino double-electron capture (2νECEC) of 124Xe and neutrinoless double-β decay (0νββ) of 136Xe in XENON1T. We consider captures from the K shell up to the N shell in the 2νECEC signal model and measure a total half-life of T2νECEC1/2=(1.1±0.2stat±0.1sys)×1022yr with a 0.87kgyr isotope exposure. The statistical significance of the signal is 7.0σ. We use XENON1T data with 36.16kgyr of 136Xe exposure to search for 0νββ. We find no evidence of a signal and set a lower limit on the half-life of T0νββ1/2>1.2×1024yrat90%CL. This is the best result from a dark matter detector without an enriched target to date. We also report projections on the sensitivity of XENONnT to 0νββ. Assuming a 275kgyr 136Xe exposure, the expected sensitivity is T0νββ1/2>2.1×1025yrat90%CL, corresponding to an effective Majorana mass range of ⟨mββ⟩<(0.19–0.59)eV/c2. | |
| dc.identifier.citation | XENON Collaboration. "Double-weak decays of 124Xe and 136Xe in the XENON1T and XENONnT experiments." <i>Physical Review C,</i> 106, no. 2 (2022) American Physical Society: https://doi.org/10.1103/PhysRevC.106.024328. | |
| dc.identifier.digital | PhysRevC-106-024328 | |
| dc.identifier.doi | https://doi.org/10.1103/PhysRevC.106.024328 | |
| dc.identifier.uri | https://hdl.handle.net/1911/113765 | |
| dc.language.iso | eng | |
| dc.publisher | American Physical Society | |
| dc.rights | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. | |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
| dc.title | Double-weak decays of 124Xe and 136Xe in the XENON1T and XENONnT experiments | |
| dc.type | Journal article | |
| dc.type.dcmi | Text | |
| dc.type.publication | publisher version |
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