Speaker
Valerio Vagelli
(Universita e INFN, Perugia (IT))
Description
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. AMS measurements of individual e$^{+}$ and e$^{−}$ fluxes show neither e$^{+}$ nor e$^{−}$ can be described by a single power law above 27.2 and 52.3 GeV, respectively. Surprisingly, above 30.2 GeV, the combined (e$^{+}$+e$^{−}$) flux can be described accurately by a single power law with a spectral index γ=-3.170 ± 0.008(stat+syst) ± 0.008(energy scale).
Primary authors
Matteo Duranti
(Universita e INFN, Perugia (IT))
Valerio Vagelli
(Universita e INFN, Perugia (IT))
