The large enriched germanium experiment for neutrinoless double beta decay (LEGEND)

By N. Abgrall, A. Abramov, N. Abrosimov, I. Abt, M. Agostini, M. Agartioglu, A. Ajjaq, S. Alvis, F. Avignone, X. Bai and 222 more. 2017

257 citations recorded by the source corpus.

The observation of neutrinoless double-beta decay (0νββ) would show that lepton number is violated, reveal that neu-trinos are Majorana particles, and provide information on neutrino mass. A discovery-capable experiment covering the inverted ordering region, with effective Majorana neutrino masses of 15 - 50 meV, will require a tonne-scale experiment with excellent energy resolution and extremely low backgrounds, at the level of ∼0.1 count /(FWHM·t·yr) in the region of the signal. The current generation 76Ge experiments GERDA and the Majorana Demonstrator, utilizing high purity Germanium detectors with an intrinsic energy resolution of 0.12%, have achieved the lowest backgrounds by over an order of magnitude in the 0νββ signal region of all 0νββ experiments. Building on this success, the LEGEND collaboration has been formed to pursue a tonne-scale 76Ge experiment. The collaboration aims to develop a phased 0νββ experimental program with discovery potential at a half-life approaching or at 1028 years, using existing resources as appropriate to expedite physics results.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f0f8d88b4322ca98e620d81ed1cf94ab92238607

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In Nuclear and High Energy Physics

1. Z. Xing
2. A. Studenikin
3. F. Deppisch
4. P. Bolton
5. H. Nunokawa
6. P. S. Bhupal Dev
7. Michael Wurm
8. L. Ludhova

Citations in the corpus

• Neutrinoless double beta decay versus other probes of heavy sterile neutrinos (2019, methodology): “This reach may be achievable at the proposed PandaX-III [215] and nEXO [216] 136Xe experiments, the LEGEND [217] 76Ge experiment and the CUPID [218] 130Te, 100Mo, 82Se and 112Cd experiment.”
• JUNO physics and detector (2021, background): “Next-generation ton-scale 0νββ decay experiments will improve the half-life sensitivity to the levels of 1027 to 1028 yr [136, 137], covering the mββ range of (10 · · · 50) meV for the inverted mass ordering.”