Heidelberg 2022 – scientific programme

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T: Fachverband Teilchenphysik

T 75: Neutrino Physics without Accelerators 6

T 75.9: Talk

Wednesday, March 23, 2022, 18:20–18:35, T-H34

Latest results from XENON1T and prospects for XENONnT for 0νββ — •Tim Michael Heinz Wolf for the XENON collaboration — MPIK, Heidelberg, Deutschland

XENON1T was a dual-phase xenon time projection chamber (TPC) looking mainly for the direct detection of WIMP dark matter at energy depositions of up to tens of keV. This talk will focus on the high energy part of the spectrum (above hundreds of keV) where we can search for neutrinoless double beta decay (0νββ). This is a hypothetical process implying two beta decays without emitting any neutrinos. The natural isotope ¹³⁶Xe (abundance approximately 8.9%) is a candidate isotope to look for 0νββ which allows to carry out a search in LXe TPCs. This process tests lepton flavour conservation and it is potentially able to shed light on the nature of neutrinos (Dirac or Majorana particles) or give hints on the mass ordering of neutrinos. We present for the first time, a search for 0νββ where a limit on the 0νββ half-life of ¹³⁶Xe with XENON1T data is derived, and give prospects on the performance of XENONnT data.