# Search for the Invisible Decay of Neutrons with KamLAND

Abstract : The Kamioka Liquid scintillator Anti-Neutrino Detector (KamLAND) is used in a search for single neutron or two neutron intra-nuclear disappearance that would produce holes in the $\it{s}$-shell energy level of $^{12}$C nuclei. Such holes could be created as a result of nucleon decay into invisible modes ($inv$), e.g. $n \to 3\nu$ or $nn \to 2\nu$. The de-excitation 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: $\tau(n\to inv)> 5.8\times 10^{29}$ years and $\tau (nn \to inv)> 1.4 \times 10^{30}$ years at 90% CL. These results represent an improvement of factors of $\sim$3 and $>10^4$ over previous experiments.
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Journal articles

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Submitted on : Monday, October 16, 2006 - 4:54:19 PM
Last modification on : Thursday, January 11, 2018 - 6:12:50 AM

### Citation

T. Araki, S. Enomoto, K. Furuno, Y. Gando, K. Ichimura, et al.. Search for the Invisible Decay of Neutrons with KamLAND. Physical Review Letters, American Physical Society, 2006, 96, pp.101802. ⟨10.1103/PhysRevLett.96.101802⟩. ⟨in2p3-00106933⟩

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