Abstract
The mythological Dirac monopole has been the object of experimental searches for nearly 50 years. In its modern context (since grand unified theories) it is massive and primordial. Experimentally, such an object should be slow (with solar or galactic escape velocity) and possibly very lightly ionizing. In the flurry of excitement surrounding B. Cabrera’s observations of last spring, 1 many groups attempted to observe or set limits on the flux of slow monopoles with “traditional” electronic particle detectors—plastic scintillators or proportional wire chambers. These experiments are the main subject of this talk, since older searches for relativistic monopoles, for monopoles at rest, etc., have recently been reviewed elsewhere.2,3 There have also been improvements in the theory of ionization by slowly-moving monopoles, and new looks at astrophysical limits. As a result, a new generation of electronic detectors is being developed which take advantage of the theoretical improvements and with sufficient aperture to improve upon astrophysical limits.
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Groom, D.E. (1985). Experimental Searches for Slowly-Moving Magnetic Monopoles. In: Newman, H.B. (eds) Electroweak Effects at High Energies. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2451-5_41
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