Search for 43e Charged Diquarks in the Cosmic Radiation at 2750-m Altitude

A large-area 3.35-m² scintillation-counter telescope consisting of eight scintillation counters and four wide-gap spark chambers was arranged to detect single particles with charges +/-43e which might be present in the cosmic radiation at 2750 m above sea level. The upper limit for the vertical flux of such particles is found to be 4.1 × 10^-10 cm^-2 sr^-1 sec^-1. Estimates of the corresponding sea-level flux are made for comparison with previous results.