Speaker
Description
We present Beyond-the-Standard-Model (BSM) physics searches accessible to LEGEND-1000, a future neutrinoless double-beta decay (0νββ) experiment with the goal of 10 ton-years exposure. LEGEND-1000 will comprise a ton of High-purity Germanium detectors, enriched to more than 90% in $^{76}$Ge, surrounded by a 300 t of liquid argon (LAr) instrumented as an active radiation shield.
With its large exposure, low background and excellent energy resolution, LEGEND-1000 can study a broad range of BSM physics. These include searches for dark matter WIMPs or axions; symmetry violations, exotic fermions and bosons that distort the shape of the two-neutrino double-beta decay spectrum; and tests of fundamental principles, including the electron decay and the Pauli exclusion principle. Backgrounds from $^{39}$Ar and $^{42}$Ar can be mitigated by using LAr from an underground source near the detectors, enabling BSM physics searches at low energy. The LAr volume can also be considered as a target volume in many BSM searches and enhance the sensitivity of LEGEND-1000.
In this poster we will present these BSM searches and their motivations, as well as the dominant backgrounds and mitigation strategies.
| Collaboration | LEGEND |
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