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) .
- Publication:
-
Physical Review Letters
- Pub Date:
- November 2014
- DOI:
- Bibcode:
- 2014PhRvL.113v1102A
- Keywords:
-
- 96.50.sb;
- 95.35.+d;
- 95.85.Ry;
- 98.70.Sa;
- Composition energy spectra and interactions;
- Dark matter;
- Neutrino muon pion and other elementary particles;
- cosmic rays;
- Cosmic rays