2014/08/30 by Zen Collaboration
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Instrumentation and Detectors (physics.ins-det) #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ex #physics.ins-det
paper · pdf · doi:10.48550/arxiv.1409.0077
8 pages, 8 figures, submitted to proceedings of the XXVI Conference on Neutrino Physics and Astrophysics (Neutrino 2014)
arxiv created 2014/08/30 · openalex publication_date 2014/08/30 · arxiv updated 2014/09/02 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
KamLAND-Zen reports on a preliminary search for neutrinoless double-beta decay with 136Xe based on 114.8 live-days after the purification of the xenon loaded liquid scintillator. In this data, the problematic 110mAg background peak identified in previous searches is reduced by more than a factor of 10. By combining the KamLAND-Zen pre- and post-purification data, we obtain a preliminary lower limit on the 0νββdecay half-life of T1/20ν > 2.6 x 1025 yr at 90% C.L. The search sensitivity will be enhanced with additional low background data after the purification. Prospects for further improvements with future KamLAND-Zen upgrades are also presented.