Results from a new search for proton decay

Details Results from a new search for proton decay Results from a new search for proton decay

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phrvl..50..651b&link_type=abstract

Physical Review Letters, vol. 50, Feb. 28, 1983, p. 651-654. Research supported by the U.S. Department of Energy and University

Physics

10

Elementary Particle Interactions, Extraterrestrial Radiation, Neutron Decay, Protons, Radioactive Decay, Electromagnetic Interactions, Nucleons, Radiation Detectors, Protons And Neutrons

Scientific paper

An experimentally testable consequence of most grand unified models of the weak, electromagnetic, and strong interactions is that protons and bound electrons are unstable. Many proton lifetime predictions are in the range of 10 to the 31st + or - 2 yr. A search for the decay of protons and neutrons bound in nuclei has been conducted with the aid of the Soudan-1 nucleon decay detector. This detector is a 31.5-metric-ton tracking calorimeter, which is instrumented with 3456 gas-filled proportional tubes. The detector is located 595 m underground in Minnesota. The overlying rock provides an attenuation of the cosmic rays equivalent to that of 1800 m of water. One Soudan-1 event which meets all the selection criteria for a nucleon decay event was observed. If the event is not a nucleon decay, the exposure and detection efficiency can be used to set a lower bound for the lifetime of nucleons.

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