Search for Cosmic-Ray Antideuteron with the BESS Spectrometer

Details Search for Cosmic-Ray Antideuteron with the BESS Spectrometer Search for Cosmic-Ray Antideuteron with the BESS Spectrometer

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....4.1797f&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

¯ Cosmic-ray antideuterons (D 's), which have never been detected, are considered to be a unique probe to investigate novel "primary" origins of cosmic-ray antiparticles, esp ecially in a low energy region below 1 GeV/nucleon. We performed a search for low-energy D with the BESS superconducting spectrometer. ¯ No candidate was found in the data obtained from four balloon flights at Lynn Lake, Canada during 1997 to 2000. We obtained, for the first time, at the 95% confidence level an upper limit of 1.9 × 10-4 (m2 s sr GeV/n)-1 for the differential flux of the cosmic ray D in the energy region between 0.17 and 1.15 GeV/n. ¯

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