7 research outputs found

    Search for antihelium in cosmic rays

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    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.Comment: 18 pages, Latex, 9 .eps figure

    A PRECISION EXPERIMENT ON ELECTRONS, PHOTONS AND MUONS AT LHC

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    We describe the upgrade of the L3 detector for running at LHC. The principle goals are the precise measurement of electrons, photons and muons

    A PRECISION EXPERIMENT ON ELECTRONS, PHOTONS AND MUONS AT LHC

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