Assuming that charged massive particles (CHAMPs) have a Maxwell-Boltzmann velocity distribution, truncated at the galactic escape velocity, and that CHAMPs comprise the galactic dark matter, we can rule out CHAMPs with masses between 350 and 8.6×{}10⁴ TeV/c² in the solar neighborhood. In addition, we can rule out masses of neutral CHAMP-proton composites between 100 and 4×{}10⁴ TeV/c², provided that they charge exchange with C or O nuclei with a cross section having a value in the interval 30 mb--30 b.
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Barwick et al. (1990) studied this question.
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