Abstract
The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta (0νββ) decay of 136Xe using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of 0νββ decay better than 1027 years, improving the current limits by at least one order of magnitude. This prediction is based on a well-understood background model dominated by radiogenic sources. The detector concept presented here represents a first step on a compelling path towards sensitivity to the parameter space defined by the inverted ordering of neutrino masses, and beyond.

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ArXiv ePrint: 2005.06467
NEXT Co-spokesperson. (J. J. Gómez-Cadenas, D. R. Nygren)
Deceased (J. T. White)
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The NEXT collaboration., Adams, C., Álvarez, V. et al. Sensitivity of a tonne-scale NEXT detector for neutrinoless double-beta decay searches. J. High Energ. Phys. 2021, 164 (2021). https://doi.org/10.1007/JHEP08(2021)164
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DOI: https://doi.org/10.1007/JHEP08(2021)164
Keywords
- Dark Matter and Double Beta Decay (experiments)