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Dark Matter signal from $\mathrm{e^{+}/e^{-}/\bar{p}}$ with the AMS-02 Detector on the International Space Station

The excess of the antiproton flux and the antiproton-to-proton flux ratio beyond the prediction of the collision of ordinary cosmic rays is a unique signal from dark matter models of neutralino annihilation. This excess cannot come from pulsars. We present precision measurements by AMS-02 of the ant...

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Detalles Bibliográficos
Autor principal: Zimmermann, Nikolas
Lenguaje:eng
Publicado: SISSA 2017
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.314.0090
http://cds.cern.ch/record/2838145
Descripción
Sumario:The excess of the antiproton flux and the antiproton-to-proton flux ratio beyond the prediction of the collision of ordinary cosmic rays is a unique signal from dark matter models of neutralino annihilation. This excess cannot come from pulsars. We present precision measurements by AMS-02 of the antiproton flux and the antiproton-to-proton flux ratio in the absolute rigidity range from 1 to 450 GV based on 3.49 × 10 5 antiproton events and 2.42 × 10 9 proton events. Comparison of our results with neutralino annihilation model shows good agreement. We also present the latest results on 16.5 × 10 6 electron and 1.08 × 10 6 positron events measured by the Alpha Magnetic Spectrometer on the International Space Station. The measurement covers the energy range up to 1000 GeV. The measured positron flux and the positron fraction are in agreement with a specific dark matter model with a neutralino mass of 1 TeV