Search for supermassive relics

S. Nakamura, K. Kawagoe, K. Yamamoto, S. Orito, H. Ichinose, T. Doke, T. Hayashi, H. Tawara, K. Ogura

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We have conducted an underground search for supermassive relic particles by an 80 m2 array consisting of three layers of track detector CR-39. The non-observation of penetrating tracks places the velocity-dependent flux upper limits down to 2 × 10-14 cm-2 s -1 sr-1 for various electrically or magnetically charged particles under assumptions on their energy losses in the low- velocity region. Assuming that the nuclear recoils are effective to the track formation of CR-39, this experiment sets the best flux limits for such relic particles in the velocity region 4 × 10-5 <β<2 × 10-4.

Original languageEnglish
Pages (from-to)395-399
Number of pages5
JournalPhysics Letters B
Issue number3-4
Publication statusPublished - Jan 15 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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