We estimate the magnetic monopole pair production cross section from internal virtual photons in p-p collisions. Comparing predictions to the only accelarator experiment to date gives a lower mass limit M ⪆ 5 GeV for monopoles produced by this mechanism. Comparison to the lunar data is made, and provided one accepts several assumptions, a limit of M ⪆ 100 GeV is obtained. The inclusion of final state interactions between monopole and antimonopole is found not to modify the salient features of the other results.
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