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

M Aguilar; D Aisa; B Alpat; A Alvino; G Ambrosi; K Andeen; L Arruda; N Attig; P Azzarello; A Bachlechner; F Barao; A Barrau; L Barrin; A Bartoloni; L Basara; M Battarbee; R Battiston; J Bazo; U Becker; M Behlmann; B Beischer; J Berdugo; B Bertucci; G Bigongiari; V Bindi; S Bizzaglia; M Bizzarri; G Boella; W de Boer; K Bollweg; V Bonnivard; B Borgia; S Borsini; M J Boschini; M Bourquin; J Burger; F Cadoux; X D Cai; M Capell; S Caroff; J Casaus; V Cascioli; G Castellini; I Cernuda; F Cervelli; M J Chae; Y H Chang; A I Chen; H Chen; G M Cheng; H S Chen; L Cheng; A Chikanian; H Y Chou; E Choumilov; V Choutko; C H Chung; C Clark; R Clavero; G Coignet; C Consolandi; A Contin; C Corti; B Coste; M Crispoltoni; Z Cui; M Dai; C Delgado; S Della Torre; M B Demirköz; L Derome; S Di Falco; L Di Masso; F Dimiccoli; C Díaz; P von Doetinchem; F Donnini; W J Du; M Duranti; D D'Urso; A Eline; F J Eppling; T Eronen; Y Y Fan; L Farnesini; J Feng; E Fiandrini; A Fiasson; E Finch; P Fisher; Y Galaktionov; G Gallucci; B García; R García-López; C Gargiulo; H Gast; I Gebauer; M Gervasi; A Ghelfi; W Gillard; F Giovacchini; P Goglov; J Gong; C Goy; V Grabski; D Grandi; M Graziani; C Guandalini; I Guerri; K H Guo; M Habiby; S Haino; K C Han; Z H He; M Heil; J Hoffman; T H Hsieh; Z C Huang; C Huh; M Incagli; M Ionica; W Y Jang; H Jinchi; K Kanishev; G N Kim; K S Kim; Th Kirn; R Kossakowski; O Kounina; A Kounine; V Koutsenko; M S Krafczyk; S Kunz; G La Vacca; E Laudi; G Laurenti; I Lazzizzera; A Lebedev; H T Lee; S C Lee; C Leluc; H L Li; J Q Li; Q Li; Q Li; T X Li; W Li; Y Li; Z H Li; Z Y Li; S Lim; C H Lin; P Lipari; T Lippert; D Liu; H Liu; T Lomtadze; M J Lu; Y S Lu; K Luebelsmeyer; F Luo; J Z Luo; S S Lv; R Majka; A Malinin; C Mañá; J Marín; T Martin; G Martínez; N Masi; D Maurin; A Menchaca-Rocha; Q Meng; D C Mo; L Morescalchi; P Mott; M Müller; J Q Ni; N Nikonov; F Nozzoli; P Nunes; A Obermeier; A Oliva; M Orcinha; F Palmonari; C Palomares; M Paniccia; A Papi; M Pauluzzi; E Pedreschi; S Pensotti; R Pereira; F Pilo; A Piluso; C Pizzolotto; V Plyaskin; M Pohl; V Poireau; E Postaci; A Putze; L Quadrani; X M Qi; T Räihä; P G Rancoita; D Rapin; J S Ricol; I Rodríguez; S Rosier-Lees; A Rozhkov; D Rozza; R Sagdeev; J Sandweiss; P Saouter; C Sbarra; S Schael; S M Schmidt; D Schuckardt; A Schulz von Dratzig; G Schwering; G Scolieri; E S Seo; B S Shan; Y H Shan; J Y Shi; X Y Shi; Y M Shi; T Siedenburg; D Son; F Spada; F Spinella; W Sun; W H Sun; M Tacconi; C P Tang; X W Tang; Z C Tang; L Tao; D Tescaro; Samuel C C Ting; S M Ting; N Tomassetti; J Torsti; C Türkoğlu; T Urban; V Vagelli; E Valente; C Vannini; E Valtonen; S Vaurynovich; M Vecchi; M Velasco; J P Vialle; L Q Wang; Q L Wang; R S Wang; X Wang; Z X Wang; Z L Weng; K Whitman; J Wienkenhöver; H Wu; X Xia; M Xie; S Xie; R Q Xiong; G M Xin; N S Xu; W Xu; Q Yan; J Yang; M Yang; Q H Ye; H Yi; Y J Yu; Z Q Yu; S Zeissler; J H Zhang; M T Zhang; X B Zhang; Z Zhang; Z M Zheng; H L Zhuang; V Zhukov; A Zichichi; N Zimmermann; P Zuccon; C Zurbach; (AMS Collaboration)

doi:10.1103/PhysRevLett.113.221102

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

Phys Rev Lett. 2014 Nov 28;113(22):221102. doi: 10.1103/PhysRevLett.113.221102. Epub 2014 Nov 26.

Authors

M Aguilar¹, D Aisa², B Alpat³, A Alvino³, G Ambrosi³, K Andeen⁴, L Arruda⁵, N Attig⁶, P Azzarello⁷, A Bachlechner⁸, F Barao⁵, A Barrau⁹, L Barrin¹⁰, A Bartoloni¹¹, L Basara¹², M Battarbee¹³, R Battiston¹⁴, J Bazo³, U Becker¹⁵, M Behlmann¹⁵, B Beischer⁸, J Berdugo¹, B Bertucci², G Bigongiari¹⁶, V Bindi¹⁷, S Bizzaglia³, M Bizzarri², G Boella¹⁸, W de Boer⁴, K Bollweg¹⁹, V Bonnivard⁹, B Borgia²⁰, S Borsini³, M J Boschini²¹, M Bourquin²², J Burger¹⁵, F Cadoux²², X D Cai¹⁵, M Capell¹⁵, S Caroff²³, J Casaus¹, V Cascioli³, G Castellini²⁴, I Cernuda¹, F Cervelli²⁵, M J Chae²⁶, Y H Chang²⁷, A I Chen¹⁵, H Chen¹⁵, G M Cheng²⁸, H S Chen²⁸, L Cheng²⁹, A Chikanian³⁰, H Y Chou²⁷, E Choumilov¹⁵, V Choutko¹⁵, C H Chung⁸, C Clark¹⁹, R Clavero³¹, G Coignet²³, C Consolandi¹⁷, A Contin³², C Corti¹⁷, B Coste¹⁴, M Crispoltoni², Z Cui²⁹, M Dai³³, C Delgado¹, S Della Torre²¹, M B Demirköz³⁴, L Derome⁹, S Di Falco²⁵, L Di Masso², F Dimiccoli¹⁴, C Díaz¹, P von Doetinchem¹⁷, F Donnini², W J Du²⁹, M Duranti³, D D'Urso³, A Eline¹⁵, F J Eppling¹⁵, T Eronen¹³, Y Y Fan³⁵, L Farnesini³, J Feng²³, E Fiandrini², A Fiasson²³, E Finch³⁰, P Fisher¹⁵, Y Galaktionov¹⁵, G Gallucci³⁶, B García¹, R García-López³¹, C Gargiulo¹⁰, H Gast⁸, I Gebauer⁴, M Gervasi¹⁸, A Ghelfi⁹, W Gillard²⁷, F Giovacchini¹, P Goglov¹⁵, J Gong³⁷, C Goy²³, V Grabski³⁸, D Grandi²¹, M Graziani³⁹, C Guandalini³², I Guerri¹⁶, K H Guo⁴⁰, M Habiby²², S Haino⁴¹, K C Han⁴², Z H He⁴⁰, M Heil¹⁵, J Hoffman²⁷, T H Hsieh¹⁵, Z C Huang⁴⁰, C Huh⁴³, M Incagli²⁵, M Ionica³, W Y Jang⁴³, H Jinchi⁴², K Kanishev¹⁴, G N Kim⁴³, K S Kim⁴³, Th Kirn⁸, R Kossakowski²³, O Kounina¹⁵, A Kounine¹⁵, V Koutsenko¹⁵, M S Krafczyk¹⁵, S Kunz⁴, G La Vacca⁴⁴, E Laudi², G Laurenti³², I Lazzizzera¹⁴, A Lebedev¹⁵, H T Lee³⁵, S C Lee³⁵, C Leluc²², H L Li³⁵, J Q Li³⁷, Q Li³⁷, Q Li¹⁵, T X Li⁴⁰, W Li⁴⁵, Y Li²², Z H Li²⁸, Z Y Li³⁵, S Lim²⁶, C H Lin³⁵, P Lipari¹¹, T Lippert⁶, D Liu³⁵, H Liu³⁷, T Lomtadze²⁵, M J Lu¹⁴, Y S Lu²⁸, K Luebelsmeyer⁸, F Luo²⁹, J Z Luo³⁷, S S Lv⁴⁰, R Majka³⁰, A Malinin⁴⁶, C Mañá¹, J Marín¹, T Martin¹⁹, G Martínez¹, N Masi³², D Maurin⁹, A Menchaca-Rocha³⁸, Q Meng³⁷, D C Mo⁴⁰, L Morescalchi²⁵, P Mott¹⁹, M Müller⁸, J Q Ni⁴⁰, N Nikonov⁴, F Nozzoli³, P Nunes⁵, A Obermeier⁸, A Oliva¹, M Orcinha⁵, F Palmonari³², C Palomares¹, M Paniccia²², A Papi³, M Pauluzzi², E Pedreschi²⁵, S Pensotti¹⁸, R Pereira⁴⁷, F Pilo²⁵, A Piluso², C Pizzolotto³, V Plyaskin¹⁵, M Pohl²², V Poireau²³, E Postaci³⁴, A Putze²³, L Quadrani³², X M Qi⁴⁰, T Räihä⁸, P G Rancoita²¹, D Rapin²², J S Ricol⁹, I Rodríguez¹, S Rosier-Lees²³, A Rozhkov¹⁵, D Rozza²¹, R Sagdeev⁴⁸, J Sandweiss³⁰, P Saouter²², C Sbarra³², S Schael⁸, S M Schmidt⁶, D Schuckardt⁴, A Schulz von Dratzig⁸, G Schwering⁸, G Scolieri³, E S Seo⁴⁶, B S Shan⁴⁵, Y H Shan⁴⁵, J Y Shi³⁷, X Y Shi¹⁵, Y M Shi⁴⁹, T Siedenburg⁸, D Son⁴³, F Spada¹¹, F Spinella²⁵, W Sun¹⁵, W H Sun¹⁵, M Tacconi¹⁸, C P Tang⁴⁰, X W Tang²⁸, Z C Tang²⁸, L Tao²³, D Tescaro³¹, Samuel C C Ting¹⁵, S M Ting¹⁵, N Tomassetti⁹, J Torsti¹³, C Türkoğlu³⁴, T Urban¹⁹, V Vagelli⁴, E Valente²⁰, C Vannini²⁵, E Valtonen¹³, S Vaurynovich¹⁵, M Vecchi²³, M Velasco¹, J P Vialle²³, L Q Wang²⁹, Q L Wang³³, R S Wang⁴⁹, X Wang¹⁵, Z X Wang⁴⁰, Z L Weng¹⁵, K Whitman¹⁷, J Wienkenhöver⁸, H Wu³⁷, X Xia¹, M Xie¹⁵, S Xie⁴⁹, R Q Xiong³⁷, G M Xin²⁹, N S Xu⁴⁰, W Xu⁵⁰, Q Yan²⁸, J Yang²⁶, M Yang²⁸, Q H Ye⁴⁹, H Yi³⁷, Y J Yu³³, Z Q Yu²⁸, S Zeissler⁴, J H Zhang³⁷, M T Zhang⁴⁰, X B Zhang⁴⁰, Z Zhang⁴⁰, Z M Zheng⁴⁵, H L Zhuang²⁸, V Zhukov⁸, A Zichichi³², N Zimmermann⁸, P Zuccon¹⁵, C Zurbach⁵¹; (AMS Collaboration)

Affiliations

¹ Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), E-28040 Madrid, Spain.
² INFN Sezione di Perugia, I-06100 Perugia, Italy and Università di Perugia, I-06100 Perugia, Italy.
³ INFN Sezione di Perugia, I-06100 Perugia, Italy.
⁴ Institut für Experimentelle Kernphysik, Karlsruhe Institute of Technology (KIT), D-76128 Karlsruhe, Germany.
⁵ Laboratório de Instrumentação e Física Experimental de Partículas, (LIP), P-1000 Lisboa, Portugal.
⁶ Jülich Supercomputing Centre and JARA-FAME, Research Centre Jülich, D-52425 Jülich, Germany.
⁷ DPNC, Université de Genève, CH-1211 Genève 4, Switzerland and INFN Sezione di Perugia, I-06100 Perugia, Italy.
⁸ I. Physics Institute and JARA-FAME, RWTH Aachen University, D-52056 Aachen, Germany.
⁹ Laboratoire de Physique Subatomique et de Cosmologie (LPSC), CNRS/IN2P3 and Université Grenoble-Alpes, F-38026 Grenoble, France.
¹⁰ European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland.
¹¹ INFN Sezione di Roma 1, I-00185 Roma, Italy.
¹² Laboratoire d'Annecy-Le-Vieux de Physique des Particules (LAPP), IN2P3/CNRS and Université de Savoie, F-74941 Annecy-le-Vieux, France and INFN TIFPA and Università di Trento, I-38123 Povo, Trento, Italy.
¹³ Space Research Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland.
¹⁴ INFN TIFPA and Università di Trento, I-38123 Povo, Trento, Italy.
¹⁵ Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA.
¹⁶ INFN Sezione di Pisa, I-56100 Pisa, Italy and Università di Pisa, I-56100 Pisa, Italy.
¹⁷ Physics and Astronomy Department, University of Hawaii, 2505 Correa Road, WAT 432, Honolulu, Hawaii 96822, USA.
¹⁸ INFN Sezione di Milano-Bicocca, I-20126 Milano, Italy and Università di Milano-Bicocca, I-20126 Milano, Italy.
¹⁹ National Aeronautics and Space Administration Johnson Space Center (JSC), and Jacobs-Sverdrup, Houston, Texas 77058, USA.
²⁰ INFN Sezione di Roma 1, I-00185 Roma, Italy and Università di Roma La Sapienza, I-00185 Roma, Italy.
²¹ INFN Sezione di Milano-Bicocca, I-20126 Milano, Italy.
²² DPNC, Université de Genève, CH-1211 Genève 4, Switzerland.
²³ Laboratoire d'Annecy-Le-Vieux de Physique des Particules (LAPP), IN2P3/CNRS and Université de Savoie, F-74941 Annecy-le-Vieux, France.
²⁴ CNR-IROE, I-50125 Firenze, Italy.
²⁵ INFN Sezione di Pisa, I-56100 Pisa, Italy.
²⁶ Department of Physics, Ewha Womans University, Seoul 120-750, Korea.
²⁷ National Central University (NCU), Chung-Li, Tao Yuan 32054, Taiwan.
²⁸ Institute of High Energy Physics (IHEP), Chinese Academy of Sciences, Beijing 100039, China.
²⁹ Shandong University (SDU), Jinan, Shandong 250100, China.
³⁰ Physics Department, Yale University, New Haven, Connecticut 06520, USA.
³¹ Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain.
³² INFN Sezione di Bologna, I-40126 Bologna, Italy and Università di Bologna, I-40126 Bologna, Italy.
³³ Institute of Electrical Engineering (IEE), Chinese Academy of Sciences, Beijing 100080, China.
³⁴ Department of Physics, Middle East Technical University (METU), 06800 Ankara, Turkey.
³⁵ Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan.
³⁶ European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland and INFN Sezione di Pisa, I-56100 Pisa, Italy.
³⁷ Southeast University (SEU), Nanjing 210096, China.
³⁸ Instituto de Física, Universidad Nacional Autónoma de México (UNAM), México D.F. 01000, Mexico.
³⁹ European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland and INFN Sezione di Perugia, I-06100 Perugia, Italy.
⁴⁰ Sun Yat-Sen University (SYSU), Guangzhou 510275, China.
⁴¹ National Central University (NCU), Chung-Li, Tao Yuan 32054, Taiwan and Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan.
⁴² National Chung-Shan Institute of Science and Technology (NCSIST), Longtan, Tao Yuan 325, Taiwan.
⁴³ CHEP, Kyungpook National University, 702-701 Daegu, Korea.
⁴⁴ European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland and INFN Sezione di Milano-Bicocca, I-20126 Milano, Italy.
⁴⁵ Beihang University (BUAA), Beijing 100191, China.
⁴⁶ IPST, University of Maryland, College Park, Maryland 20742, USA.
⁴⁷ Physics and Astronomy Department, University of Hawaii, 2505 Correa Road, WAT 432, Honolulu, Hawaii 96822, USA and Laboratório de Instrumentação e Física Experimental de Partículas, (LIP), P-1000 Lisboa, Portugal.
⁴⁸ East-West Center for Space Science, University of Maryland, College Park, Maryland 20742, USA.
⁴⁹ Shanghai Jiaotong University (SJTU), Shanghai 200030, China.
⁵⁰ Institute of High Energy Physics (IHEP), Chinese Academy of Sciences, Beijing 100039, China and Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA.
⁵¹ Laboratoire Univers et Particules de Montpellier (LUPM), IN2P3/CNRS and Université de Montpellier II, F-34095 Montpellier, France.

PMID: 25494065
DOI: 10.1103/PhysRevLett.113.221102

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).