Determination of Z/β for strange quark matter candidates with CR-39 track detector

Abstract In order to confirm the existence of strange quark matter (SQM) in cosmic rays, a series of international balloon flights with a hybrid system combining active counters and passive detectors was conducted under the collaboration between Japan and Italy. In this report, the methodology of how to detect SQM with the hybrid system and how to determine Z / β with CR-39 track detectors are presented.