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Title: Measurement of the Xe136 two-neutrino double-β-decay half-life via direct background subtraction in NEXT

Journal Article · · Phys.Rev.C

We report a measurement of the half-life of the Xe 136 two-neutrino double- β decay performed with a novel direct-background-subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with Xe 136 -enriched and Xe 136 -depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-life of 2 . 34 - 0.46 + 0.80 (stat) - 0.17 + 0.30 (sys) × 10 21 yr is derived from the background-subtracted energy spectrum. The presented technique demonstrates the feasibility of unique background-model-independent neutrinoless double- β -decay searches.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
NEXT
DOE Contract Number:
AC02-07CH11359
OSTI ID:
1870658
Report Number(s):
FERMILAB-PUB-22-395-ND-SCD; arXiv:2111.11091; oai:inspirehep.net:1972928
Journal Information:
Phys.Rev.C, Vol. 105, Issue 5
Country of Publication:
United States
Language:
English

References (19)

Final Results of GERDA on the Search for Neutrinoless Double- β Decay journal December 2020
Measurement of radon-induced backgrounds in the NEXT double beta decay experiment journal October 2018
Precise Half-Life Values for Two-Neutrino Double-β Decay: 2020 Review journal September 2020
Improved measurement of the 2 ν β β half-life of 136 Xe with the EXO-200 detector journal January 2014
Sensitivity of a tonne-scale NEXT detector for neutrinoless double-beta decay searches journal August 2021
Precision Analysis of the Xe 136 Two-Neutrino β β Spectrum in KamLAND-Zen and Its Impact on the Quenching of Nuclear Matrix Elements journal May 2019
Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen journal August 2016
Boosting background suppression in the NEXT experiment through Richardson-Lucy deconvolution journal July 2021
The search for neutrinoless double beta decay journal January 2012
Radiogenic backgrounds in the NEXT double beta decay experiment journal October 2019
Sensitivity of NEXT-100 to neutrinoless double beta decay journal May 2016
Demonstration of the event identification capabilities of the NEXT-White detector journal October 2019
Mitigation of backgrounds from cosmogenic 137 Xe in xenon gas experiments using 3 He neutron capture journal May 2020
Energy calibration of the NEXT-White detector with 1% resolution near Qββ of 136Xe journal October 2019
Publisher’s Note: Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen [Phys. Rev. Lett. 117 , 082503 (2016)] journal September 2016
Event generator DECAY4 for simulating double-beta processes and decays of radioactive nuclei journal July 2000
Neutrinoless Double-Beta Decay: Status and Prospects journal October 2019
Calibration of the NEXT-White detector using 83m Kr decays journal October 2018
The NEXT White (NEW) detector journal December 2018