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      First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV

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      Physical Review Letters
      American Physical Society (APS)
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          Abstract

          A precision measurement by the Alpha Magnetic Spectrometer on the International Space Station of the positron fraction in primary cosmic rays in the energy range from 0.5 to 350 GeV based on 6.8 × 10(6) positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 to ∼ 250  GeV, but, from 20 to 250 GeV, the slope decreases by an order of magnitude. The positron fraction spectrum shows no fine structure, and the positron to electron ratio shows no observable anisotropy. Together, these features show the existence of new physical phenomena.

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          An anomalous positron abundance in cosmic rays with energies 1.5–100 GeV

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            Pulsars as the sources of high energy cosmic ray positrons

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              Kaluza-Klein Dark Matter

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                Author and article information

                Journal
                PRLTAO
                Physical Review Letters
                Phys. Rev. Lett.
                American Physical Society (APS)
                0031-9007
                1079-7114
                April 2013
                April 3 2013
                : 110
                : 14
                Article
                10.1103/PhysRevLett.110.141102
                25166975
                9f2e36e1-6026-405c-b991-dbf6e6b2d861
                © 2013

                http://link.aps.org/licenses/aps-default-license

                http://link.aps.org/licenses/aps-default-accepted-manuscript-license

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