Search for the invisible decay of neutrons with KamLAND

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Date
2006-03-17
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Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract

The Kamioka Liquid scintillator Anti-Neutrino Detector is used in a search for single neutron or two-neutron intranuclear disappearance that would produce holes in the s-shell energy level of C-12 nuclei. Such holes could be created as a result of nucleon decay into invisible modes (inv), e.g., n -> 3 nu or nn -> 2 nu. The deexcitation of the corresponding daughter nucleus results in a sequence of space and time-correlated events observable in the liquid scintillator detector. We report on new limits for one- and two-neutron disappearance: tau(n -> inv)> 5.8x10(29) years and tau(nn -> inv)> 1.4x10(30) years at 90% C.L. These results represent an improvement of factors of similar to 3 and > 10(4) over previous experiments.

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Keywords
Physics, Multidisciplinary, Physics
Citation
Araki, T. (2006): Search for the Invisible Decay of Neutrons with KamLAND. Physical Review Letters, 96(10). DOI: https://doi.org/10.1103/PhysRevLett.96.101802