@article{4ed5afe5b5714bfbb8b35419f26ada33,
title = "High statistics measurement of the positron fraction in primary cosmic rays of 0.5-500 GeV with the alpha magnetic spectrometer on the international space station",
abstract = "A precision measurement by AMS of the positron fraction in primary cosmic rays in the energy range from 0.5 to 500 GeV based on 10.9 million positron and electron events is presented. This measurement extends the energy range of our previous observation and increases its precision. The new results show, for the first time, that above ∼200GeV the positron fraction no longer exhibits an increase with energy.",
author = "{AMS Collaboration} and L. Accardo and M. Aguilar and D. Aisa and B. Alpat and A. Alvino and G. Ambrosi and K. Andeen and L. Arruda and N. Attig and P. Azzarello and A. Bachlechner and F. Barao and A. Barrau and L. Barrin and A. Bartoloni and L. Basara and M. Battarbee and R. Battiston and J. Bazo and U. Becker and M. Behlmann and B. Beischer and J. Berdugo and B. Bertucci and G. Bigongiari and V. Bindi and S. Bizzaglia and M. Bizzarri and G. Boella and {De Boer}, W. and K. Bollweg and V. Bonnivard and B. Borgia and S. Borsini and Boschini, {M. J.} and M. Bourquin and J. Burger and F. Cadoux and Cai, {X. D.} and M. Capell and S. Caroff and G. Carosi and J. Casaus and V. Cascioli and G. Castellini and I. Cernuda and D. Cerreta and F. Cervelli and Chae, {M. J.} and Chang, {Y. H.} and Liqiu Wang",
note = "Publisher Copyright: {\textcopyright} 2014 American Physical Society.",
year = "2014",
month = sep,
day = "18",
doi = "10.1103/PhysRevLett.113.121101",
language = "English",
volume = "113",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "12",
}