Search for nucleon decays with EXO-200
Abstract
A search for instability of nucleons bound in 136Xe nuclei is reported with 223 kg·yr exposure of 136Xe in the EXO-200 experiment. Lifetime limits of 3.3× 1023 and 1.9× 1023 yrs are established for nucleon decay to 133Sb and 133Te, respectively. These are the most stringent to date, exceeding the prior decay limits by a factor of 9 and 7, respectively.
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