Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 43: Neutrinophysik II

T 43.1: Group Report

Tuesday, March 20, 2018, 16:30–16:50, Z6 - SR 2.012

The Large Enriched Germanium Experiment for Neutrinoless double beta Decay - LEGEND — •Yoann Kermaidic — Max Planck Institute fur Kernphysik, Heidelberg

The search for neutrinoless double beta (0νββ) decay is a very sensitive tool for probing whether neutrinos are Dirac or Majorana particles. A potential discovery has far reaching consequences for particle physics and cosmology (leptogenesis). Current ⁷⁶Ge based experiments, Gerda and Majorana Demonstrator, benefit from a superior energy resolution and the lowest background at Q_ββ in the field if normalized by the resolution. This demonstrates the feasibility of Germanium for a next generation experiment. The Legend (Large Enriched Germanium Experiment for Neutrinoless ββ Decay) collaboration has been founded with the goal to build a ton scale experiment and boost the 0νββ decay half-life sensitivity by two orders of magnitude. The collaboration envisions a phased approach based on the Gerda and Majorana Demonstrator experience, starting with existing resources as appropriate to expedite physics results. This talk will present the general aspect of Legend and focus on the ongoing developments for the first 200 kg phase using the Gerda cryostat at LNGS underground laboratory in Italy.