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Search for antihelium in cosmic rays (2005)

Abstract
The Alpha Magnetic Spectrometer (AMS) was flown on the space shuttle Discovery during flight STS-91 in a 51.7 degree orbit at altitudes between 320 and 390 km. A total of 2.86 * 10^6 helium nuclei were observed in the rigidity range 1 to 140 GV. No antihelium nuclei were detected at any rigidity. An upper limit on the flux ratio of antihelium to helium of < 1.1 * 10^-6 is obtained.

Publication details
Download http://hal.in2p3.fr/in2p3-00005533/en/
Publisher HAL - CCSD
Repository CCSd/HAL : e-articles server (based on gBUS) (France)
Keywords Physics/Astrophysics, Sciences of the Universe/Astrophysics
Type peer-reviewed article
Relation http://hal.archives-ouvertes.fr/docs/00/00/91/40/PDF/democrite-00005533.pdf