期刊
PHYSICAL REVIEW D
卷 62, 期 9, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevD.62.092003
关键词
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We have searched for nucleon decay into five two-body final states using a 4.4 kiloton-year fiducial exposure of the Soudan 2 iron tracking calorimeter. For proton decay into the fully visible final states mu (+) eta (0) and e(+) eta (0), we observe zero and one event, respectively, that satisfy our search criteria for nucleon decay. The lifetime lower limits (tau /B) thus implied are 89 x 10(30) years and 81 x 10(30) years at 90% confidence level. For neutron decay into <()over bar>eta0, we obtain the lifetime lower limit 71 x 10(30) years. Limits are also reported for neutron decay into <()over bar>pi (0), and for proton decay into <()over bar>pi (+).
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