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Precision Measurement of the (e++e−) Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station

Abstract : We present a measurement of the cosmic ray (e++e−) flux in the range 0.5 GeV to 1 TeV based on the analysis of 10.6 million (e++e−) events collected by AMS. The statistics and the resolution of AMS provide a precision measurement of the flux. The flux is smooth and reveals new and distinct information. Above 30.2 GeV, the flux can be described by a single power law with a spectral index γ=−3.170±0.008(stat+syst)±0.008(energy scale).
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http://hal.in2p3.fr/in2p3-01088104
Contributor : Emmanuelle Vernay <>
Submitted on : Thursday, November 27, 2014 - 1:49:02 PM
Last modification on : Tuesday, November 24, 2020 - 5:18:02 PM

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M. Aguilar, A. Barrau, V. Bonnivard, L. Derome, A. Ghelfi, et al.. Precision Measurement of the (e++e−) Flux in Primary Cosmic Rays from 0.5 GeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station. Physical Review Letters, American Physical Society, 2014, 113, pp.221102. ⟨10.1103/PhysRevLett.113.221102⟩. ⟨in2p3-01088104⟩

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