It is suggested that monopole-antimonopole pair production initiated by pointlike particles (electrons, quarks) has widely different cross sections in the two cases of "point-like" and composite monopoles, respectively. Production of 't Hooft-Polyakov monopoles is expected to be suppressed by a hugh factor, {≥}10³⁰. Furthermore, astrophysical evidence is presented suggesting that monopoles with mₘ≈10⁴ GeV/c² cannot be point-like.
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Drukier et al. (1982) studied this question.
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