Summary
The charge ratio of cosmic-ray muons at sea-level is calculated by using recent experimental results on cosmic-ray primaries and hadron (lepton)-nucleus collisions. It is shown that the charge ratio agrees with the observed ratio up to 10 TeV if a fraction 0.05 of quark-gluon plasma state in nucleus-nucleus collisions is included.
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Minorikawa, Y., Mitsui, K. New interpretation of the charge ratio of Cosmic-Ray muons. Lett. Nuovo Cimento 41, 333–338 (1984). https://doi.org/10.1007/BF02748371
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DOI: https://doi.org/10.1007/BF02748371