Summary
The flux of relativistic leptonic particles with charges ±e/3, ±2e/3, ±4e/3 in cosmic rays underground at 63 m w.e. was measured using a six-scintillation-counter telescope. The following upper limits were established: φ(±e/3)≤1.8·10−10 cm−2sr−1s−1, (90% confidence) φ(±2e/3)≤1.8·10−10 cm−2sr−1s−1, (90% confidence) φ(±4e/3)≤(1.1±1.8)·10−8 cm−2 sr−1 s−1, at threshold energies of (2.1±0.1) GeV, (8.5±0.6) GeV, (22±1) GeV respectively.
Riassunto
Si sono misurati i flussi di particelle leptoniche relativistiche di cariche ±e/3, ±2e/3, ±4e/3 nella radiazione cosmica sottoterra con 63 m a.e. a mezzo di un telescopio formato da sei contatori plastici a scintillazione. Si sono ottenuti iseguenti limiti superiori: φ(±e/3)≤1.8·10−10 cm−2 sr−1 s−1, (90% l.c.), φ(±2e/3)≤1.8·10−10 cm−2 sr−1 s−1 (90% l.c.), φ(±4e/3)≤(1.1±1.8)·10−8 cm−2 sr−1 s−1, rispettivamente nelle condizioni di (2.1±0.1) GeV, (8.5±0.6) GeV e (22±1) GeV di energia di soglia.
Резюме
Гыл измерен поток релятивистских лептонных частиц с зарядами ±e/3, ±2e/3, ±4e/3 в космических лучах под землей при 63 m w.e., используя телескоп шести сцинтилляционных счетчиков. Установлены следующие верхние пределы: φ(±e/3)≤1.8·10−10 см−2 ст−1 сек−1, φ(±2e/3)≤1.8·10−10 см−2 ст−1 сек−1, φ(±4e/3)≤(1.1±1.8)·10−8 см−2 ст−1 сек−1, причем, первые два результата с достоверностью 0.9, при пороговых энергиях (2.1±0.1) ГэВ, (8.5±0.6) ГэВ, (22±1) ГэВ, соответственно.
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Briatore, L., Castagnoli, C., Bollini, D. et al. An underground search for leptonic quarks in the cosmic radiation. Nuovo Cimento A (1965-1970) 57, 850–862 (1968). https://doi.org/10.1007/BF02751389
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DOI: https://doi.org/10.1007/BF02751389