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
Date Issued
18 September 2014
Access level
open access
Resource Type
journal article
Author(s)
Accardo L.
Aguilar M.
Aisa D.
Alpat B.
Alvino A.
Ambrosi G.
Andeen K.
Arruda L.
Attig N.
Azzarello P.
Bachlechner A.
Barao F.
Barrau A.
Barrin L.
Bartoloni A.
Basara L.
Battarbee M.
Battiston R.
Becker U.
Behlmann M.
Beischer B.
Berdugo J.
Bertucci B.
Bigongiari G.
Bindi V.
Bizzaglia S.
Bizzarri M.
Boella G.
De Boer W.
Bollweg K.
Bonnivard V.
Borgia B.
Borsini S.
Boschini M.J.
Bourquin M.
Burger J.
Cadoux F.
Cai X.D.
Capell M.
Caroff S.
Carosi G.
Casaus J.
Cascioli V.
Castellini G.
Cernuda I.
Cerreta D.
Cervelli F.
Chae M.J.
Chang Y.H.
Chen A.I.
Chen H.
Cheng G.M.
Chen H.S.
Cheng L.
Chikanian A.
Chou H.Y.
Choumilov E.
Choutko V.
Chung C.H.
Cindolo F.
Clark C.
Clavero R.
Coignet G.
Consolandi C.
Contin A.
Corti C.
Coste B.
Cui Z.
Dai M.
Delgado C.
Della Torre S.
Demirköz M.B.
Derome L.
Di Falco S.
Di Masso L.
Dimiccoli F.
Díaz C.
Von Doetinchem P.
Du W.J.
Duranti M.
D'Urso D.
Eline A.
Eppling F.J.
Eronen T.
Fan Y.Y.
Farnesini L.
Feng J.
Fiandrini E.
Fiasson A.
Finch E.
Fisher P.
Galaktionov Y.
Gallucci G.
García B.
García-López R.
Gast H.
Gebauer I.
Gervasi M.
Ghelfi A.
RWTH Aachen University
Publisher(s)
American Physical Society
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.
Volume
113
Issue
12
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Astronomía
Scopus EID
2-s2.0-84907246464
Source
Physical Review Letters
ISSN of the container
00319007
Sources of information:
Directorio de Producción Científica
Scopus