Phys. Rev. D 61, 072004 (2000) [16 pages]Search for nucleon decay into lepton+K0 final states using Soudan 2Received 7 June 1999; published 8 March 2000 A search for nucleon decay into two-body final states containing K0 mesons has been conducted using the 963 metric ton Soudan 2 iron tracking calorimeter. The topologies, ionizations, and kinematics of contained events recorded in a 5.52 kiloton-year total exposure (4.41 kton-year fiducial volume exposure) are examined for compatibility with nucleon decays in an iron medium. For proton decay into the fully visible final states μ+KS0 and e+KS0, zero and one event candidates are observed respectively. The lifetime lower limits (τ/B) thus implied are 1.5×1032yr and 1.2×1032yr, respectively. Lifetime lower limits are also reported for proton decay into l+Kl0, and for neutron decay into νKS0. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.61.072004
DOI:
10.1103/PhysRevD.61.072004
PACS:
11.30.Fs, 11.30.Pb, 12.20.Fv, 14.20.Dh
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