Publications by authors named "M P Decowski"
Article Synopsis
- The XENONnT dark matter experiment successfully measured nuclear recoils from solar ^{8}B neutrinos, marking a significant advancement in neutrino detection technology.
- Using a two-phase time projection chamber with a 5.9 t liquid xenon target, the experiment produced 37 observed events, which surpassed the expected background events, indicating a notable signal.
- The results provide a measured solar neutrino flux consistent with previous studies and confirm the neutrino cross section predictions aligned with the Standard Model, showcasing the effectiveness of dark matter detectors in neutrino research.
The multi-staged XENON program at INFN Laboratori Nazionali del Gran Sasso aims to detect dark matter with two-phase liquid xenon time projection chambers of increasing size and sensitivity. The XENONnT experiment is the latest detector in the program, planned to be an upgrade of its predecessor XENON1T. It features an active target of 5.
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- The XENONnT experiment conducted the first search for nuclear recoils caused by weakly interacting massive particles (WIMPs) using a 5.9-ton liquid xenon detector.
- During the experiment, the background noise from radioactive isotopes was minimized, yielding a low electronic recoil background rate of 15.8 events per ton per year per keV.
- The analysis found no significant excess of nuclear recoil events, leading to an improved upper limit on the WIMP-nucleon interaction cross section, surpassing previous results from the earlier XENON1T experiment.
Multiple viable theoretical models predict heavy dark matter particles with a mass close to the Planck mass, a range relatively unexplored by current experimental measurements. We use 219.4 days of data collected with the XENON1T experiment to conduct a blind search for signals from multiply interacting massive particles (MIMPs).
View Article and Find Full Text PDFThe KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta (0νββ) decay half-life in ^{136}Xe using a xenon-loaded liquid scintillator. We report an improved search using an upgraded detector with almost double the amount of xenon and an ultralow radioactivity container, corresponding to an exposure of 970 kg yr of ^{136}Xe. These new data provide valuable insight into backgrounds, especially from cosmic muon spallation of xenon, and have required the use of novel background rejection techniques.
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