Galactic and extragalactic core-collapse supernova neutrino flux detection in the LEGEND muon veto

Parallel talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/) On behalf of the LEGEND Collaboration Abstract: The LEGEND Collaboration advances an experimental program to search for the neutrinoless double-beta decay of 76 Ge.It has recently released the first results on the decay search based on 61 kg yr of data collected by the first stage of the experiment, LEGEND-200. It operates high-purity germanium (HPGe) detectors enriched in 76 Ge immersed in a cryostat filled with pure liquid argon. The cryostat is deployed in a tank filled with 590 m3 of purifiedwater, instrumented with photomultiplier tubes to tag cosmic-ray induced muon events, and to passively shield the detectors against environmental radioactivity.The second stage of the experiment, LEGEND-1000, aims to operate up to one ton of HPGe detectors enriched in 76 Ge with different proposals to optimize the water tank features.In this presentation, we explore the detection capabilities and sensitivity of the LEGEND muon veto in both phases of the experiment to the neutrino flux from core-collapse supernovae. The ability to identify the time of black hole formation is also discussed. This work is supported by the U.S. DOE, and the NSF, the LANL, ORNL and LBNL LDRD programs; the European ERC and Horizon programs; the German DFG, BMBF, and MPG; the Italian INFN; the Polish NCN and MNiSW; the Czech MEYS; the Slovak RDA; the Swiss SNF; the UK STFC; the Canadian NSERC and CFI; the LNGS and SURF facilities.