New limit on magnetic monopole flux

Details New limit on magnetic monopole flux New limit on magnetic monopole flux

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phrvl..50..655b&link_type=abstract

Physical Review Letters, vol. 50, Feb. 28, 1983, p. 655-658. Research supported by the U.S. Department of Energy and University

Astronomy and Astrophysics

Astrophysics

33

Astrophysics, Magnetic Monopoles, Nucleons, Particle Flux Density, Radioactive Decay, Big Bang Cosmology, Electromagnetic Interactions, Magnetic Fields, Unified Field Theory, Magnetic Monopoles

Scientific paper

Grand unified theories of strong, electromagnetic, and weak interactions predict the existence of very massive magnetically charged particles. The magnetic monopole charge is a multiple of the Dirac charge, and the predicted monopole mass is 10 to the 16th GeV. The underground Soudan-1 nucleon decay experiment makes it possible to measure the velocities of slowly moving particles if they can be detected by ionization at a level 0.5 times that of a relativistic muon. If the velocities of the magnetic monopoles are greater than 0.001 c, the monopoles should satisfy the detection requirements. During a live time of 0.41 yr, no candidate for magnetic monopole was observed. The implied 90%-confidence-level limit on the flux of such objects is less than 4.1 x 10 to the -13th per (sq cm sr s) for velocities in the range from 0.001 c to 0.01 c.

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