Measurement of the <math><mmultiscripts><mi>Xe</mi><mprescripts/><none/><mn>136</mn></mmultiscripts></math> two-neutrino double-<math><mi>β</mi></math>-decay half-life via direct background subtraction in NEXT - INSPIRE

DataBETA

Measurement of the ${}^{136}{Xe}$ two-neutrino double- $β$ -decay half-life via direct background subtraction in NEXT

NEXT

Collaboration

•

P. Novella
(
- Valencia U., IFIC
)

Nov 22, 2021

9 pages

Published in:

Phys.Rev.C 105 (2022) 5, 055501

Published: May 10, 2022

e-Print:

2111.11091 [nucl-ex]

DOI:

10.1103/PhysRevC.105.055501 (publication)

PDG: Half-life measurements of the two-neutrino double-

\beta

Report number:

FERMILAB-PUB-22-395-ND-SCD

Experiments:

LSC, Canfranc-NON-NEXT

View in:

reference search33 citations

Citations per year

Abstract: (APS)

We report a measurement of the half-life of the

{}^{136}{Xe}

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

{}^{136}{Xe}

-enriched and

{}^{136}{Xe}

-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) \times 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.

Note:

9 pages, 7 figures, and 1 appendix

double-beta decay: (0neutrino)
background
tracks
energy spectrum
xenon
topology
experimental results
NEXT

References(20)

Figures(8)

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