Search for Nucleon Decay with Final States l+ eta, nubar eta, and nubar pi+,0 Using Soudan 2

Abstract

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 and e+ eta, 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 nubar eta, we obtain the lifetime lower limit 71 x 10^30 years. Limits are also reported for neutron decay into nubar pi0, and for proton decay into nubar pi+.

arXiv comment24 pages, 9 figures, 3 tables

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Cited by in corpus (7)

• Observation of Atmospheric Neutrino Oscillations in Soudan 2
• Baryon Destruction by Asymmetric Dark Matter
• A Search for Nucleon Decay via $n\to \bar{\nu }{\pi }^0$ and $p\to \bar{\nu }{\pi }^{+}$ in Super-Kamiokande
• Proton Decay in a Minimal SUSY SO(10) Model for Neutrino Mixings
• Search for Neutron-Antineutron Oscillations Using Multiprong Events in Soudan 2
• Nucleon Decay into Dark Sector
• Two Nucleon (B-L)-Conserving Reactions Involving Tau Leptons