CERN Accelerating science

Article
Title Electron and Positron Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station
Author(s)

Aguilar, M (Madrid, CIEMAT) ; Aisa, D (INFN, Perugia ; U. Perugia (main)) ; Alvino, A (INFN, Perugia) ; Ambrosi, G (INFN, Perugia) ; Andeen, K (Karlsruhe U., EKP) ; Arruda, L (LIP, Lisbon) ; Attig, N (Julich, NIC ; JARA-FAME, Jülich) ; Azzarello, P (Geneva U. ; INFN, Perugia) ; Bachlechner, A (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Barao, F (LIP, Lisbon) ; Barrau, A (LPSC, Grenoble) ; Barrin, L (CERN) ; Bartoloni, A (INFN, Rome) ; Basara, L (Annecy, LAPP ; Savoie U. (main) ; INFN, Trento ; Trento U.) ; Battarbee, M (Turku U.) ; Battiston, R (INFN, Trento ; Trento U. ; ASI, Rome) ; Bazo, J (INFN, Perugia) ; Becker, U (MIT) ; Behlmann, M (MIT) ; Beischer, B (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Berdugo, J (Madrid, CIEMAT) ; Bertucci, B (INFN, Perugia ; U. Perugia (main)) ; Bigongiari, G (INFN, Pisa ; U. Pisa (main)) ; Bindi, V (Hawaii U.) ; Bizzaglia, S (INFN, Perugia) ; Bizzarri, M (INFN, Perugia ; U. Perugia (main)) ; Boella, G (INFN, Milan Bicocca ; Milan Bicocca U.) ; de Boer, W (Karlsruhe U., EKP) ; Bollweg, K (NASA, Houston ; Jacobs-Sverdrup, Houston) ; Bonnivard, V (LPSC, Grenoble) ; Borgia, B (INFN, Rome ; U. Rome La Sapienza (main)) ; Borsini, S (INFN, Perugia) ; Boschini, M J (INFN, Milan Bicocca) ; Bourquin, M (Geneva U.) ; Burger, J (MIT) ; Cadoux, F (Geneva U.) ; Cai, X D (MIT) ; Capell, M (MIT) ; Caroff, S (Annecy, LAPP ; Savoie U. (main)) ; Casaus, J (Madrid, CIEMAT) ; Cascioli, V (INFN, Perugia) ; Castellini, G (Florence, IROE) ; Cernuda, I (Madrid, CIEMAT) ; Cervelli, F (INFN, Pisa) ; Chae, M J (Ewha Women's U., Seoul) ; Chang, Y H (Taiwan, Natl. Central U.) ; Chen, A I (MIT) ; Chen, H (MIT) ; Cheng, G M (Beijing, Inst. High Energy Phys.) ; Chen, H S (Beijing, Inst. High Energy Phys.) ; Cheng, L (Shandong U.) ; Chikanian, A (Yale U.) ; Chou, H Y (Taiwan, Natl. Central U.) ; Choumilov, E (MIT) ; Choutko, V (MIT) ; Chung, C H (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Clark, C (NASA, Houston ; Jacobs-Sverdrup, Houston) ; Clavero, R (IAC, La Laguna) ; Coignet, G (Annecy, LAPP ; Savoie U. (main)) ; Consolandi, C (Hawaii U.) ; Contin, A (INFN, Bologna ; U. Bologna (main)) ; Corti, C (Hawaii U.) ; Coste, B (INFN, Trento ; Trento U.) ; Cui, Z (Shandong U.) ; Dai, M (Inst. Electr. Engin., Beijing) ; Delgado, C (Madrid, CIEMAT) ; Della Torre, S (INFN, Milan Bicocca) ; Demirköz, M B (Middle East Tech. U., Ankara) ; Derome, L (LPSC, Grenoble) ; Di Falco, S (INFN, Pisa) ; Di Masso, L (INFN, Perugia ; U. Perugia (main)) ; Dimiccoli, F (INFN, Trento ; Trento U.) ; Díaz, C (Madrid, CIEMAT) ; von Doetinchem, P (Hawaii U.) ; Du, W J (Shandong U.) ; Duranti, M (INFN, Perugia) ; D’Urso, D (INFN, Perugia) ; Eline, A (MIT) ; Eppling, F J (MIT) ; Eronen, T (Turku U.) ; Fan, Y Y (Taiwan, Inst. Phys. ; Xian Jiaotong U.) ; Farnesini, L (INFN, Perugia) ; Feng, J (Annecy, LAPP ; Savoie U. (main) ; SYSU, Guangzhou) ; Fiandrini, E (INFN, Perugia ; U. Perugia (main)) ; Fiasson, A (Annecy, LAPP ; Savoie U. (main)) ; Finch, E (Yale U.) ; Fisher, P (MIT) ; Galaktionov, Y (MIT) ; Gallucci, G (CERN ; INFN, Pisa) ; García, B (Madrid, CIEMAT) ; García-López, R (IAC, La Laguna) ; Gast, H (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Gebauer, I (Karlsruhe U., EKP) ; Gervasi, M (INFN, Milan Bicocca ; Milan Bicocca U.) ; Ghelfi, A (LPSC, Grenoble) ; Gillard, W (Taiwan, Natl. Central U.) ; Giovacchini, F (Madrid, CIEMAT) ; Goglov, P (MIT) ; Gong, J (Southeast U., Nanjing) ; Goy, C (Annecy, LAPP ; Savoie U. (main)) ; Grabski, V (Mexico U.) ; Grandi, D (INFN, Milan Bicocca) ; Graziani, M (CERN ; INFN, Perugia) ; Guandalini, C (INFN, Bologna ; U. Bologna (main)) ; Guerri, I (INFN, Pisa ; U. Pisa (main)) ; Guo, K H (Zhongshan U.) ; Habiby, M (Geneva U.) ; Haino, S (Taiwan, Natl. Central U. ; Taiwan, Inst. Phys.) ; Han, K C (CSIST, Taiwan) ; He, Z H (Zhongshan U.) ; Heil, M (MIT ; Karlsruhe U., EKP) ; Hoffman, J (Taiwan, Natl. Central U.) ; Hsieh, T H (MIT) ; Huang, Z C (Zhongshan U.) ; Huh, C (Kyungpook Natl. U., Daegu (Main) ; CHEP, Taegu) ; Incagli, M (INFN, Pisa) ; Ionica, M (INFN, Perugia) ; Jang, W Y (Kyungpook Natl. U., Daegu (Main) ; CHEP, Taegu) ; Jinchi, H (CSIST, Taiwan) ; Kanishev, K (INFN, Trento ; Trento U.) ; Kim, G N (Kyungpook Natl. U., Daegu (Main) ; CHEP, Taegu) ; Kim, K S (Kyungpook Natl. U., Daegu (Main) ; CHEP, Taegu) ; Kirn, Th (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Kossakowski, R (Annecy, LAPP ; Savoie U. (main)) ; Kounina, O (MIT) ; Kounine, A (MIT) ; Koutsenko, V (MIT) ; Krafczyk, M S (MIT) ; Kunz, S (Karlsruhe U., EKP) ; La Vacca, G (CERN ; INFN, Milan Bicocca) ; Laudi, E (INFN, Perugia ; U. Perugia (main)) ; Laurenti, G (INFN, Bologna ; U. Bologna (main)) ; Lazzizzera, I (INFN, Trento ; Trento U.) ; Lebedev, A (MIT) ; Lee, H T (Taiwan, Inst. Phys.) ; Lee, S C (Taiwan, Inst. Phys.) ; Leluc, C (Geneva U.) ; Li, H L (Taiwan, Inst. Phys. ; Shandong U.) ; Li, J Q (Southeast U., Nanjing) ; Li, Q (Southeast U., Nanjing) ; Li, Q (MIT ; Harbin Inst. Tech.) ; Li, T X (Zhongshan U.) ; Li, W (BeiHang U.) ; Li, Y (Geneva U. ; SYSU, Guangzhou) ; Li, Z H (Beijing, Inst. High Energy Phys.) ; Li, Z Y (Taiwan, Inst. Phys. ; SYSU, Guangzhou) ; Lim, S (Ewha Women's U., Seoul) ; Lin, C H (Taiwan, Inst. Phys.) ; Lipari, P (INFN, Rome) ; Lippert, T (Julich, NIC ; JARA-FAME, Jülich) ; Liu, D (Taiwan, Inst. Phys.) ; Liu, H (Southeast U., Nanjing) ; Lomtadze, T (INFN, Pisa) ; Lu, M J (INFN, Trento ; Trento U. ; CUST, Hefei) ; Lu, Y S (Beijing, Inst. High Energy Phys.) ; Luebelsmeyer, K (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Luo, F (Shandong U.) ; Luo, J Z (Southeast U., Nanjing) ; Lv, S S (Zhongshan U.) ; Majka, R (Yale U.) ; Malinin, A (Maryland U., College Park) ; Mañá, C (Madrid, CIEMAT) ; Marín, J (Madrid, CIEMAT) ; Martin, T (NASA, Houston ; Jacobs-Sverdrup, Houston) ; Martínez, G (Madrid, CIEMAT) ; Masi, N (INFN, Bologna ; U. Bologna (main)) ; Maurin, D (LPSC, Grenoble) ; Menchaca-Rocha, A (Mexico U.) ; Meng, Q (Southeast U., Nanjing) ; Mo, D C (Zhongshan U.) ; Morescalchi, L (INFN, Pisa ; U. Siena (main)) ; Mott, P (NASA, Houston ; Jacobs-Sverdrup, Houston) ; Müller, M (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Ni, J Q (Zhongshan U.) ; Nikonov, N (Karlsruhe U., EKP) ; Nozzoli, F (INFN, Perugia) ; Nunes, P (LIP, Lisbon) ; Obermeier, A (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Oliva, A (Madrid, CIEMAT) ; Orcinha, M (LIP, Lisbon) ; Palmonari, F (INFN, Bologna ; U. Bologna (main)) ; Palomares, C (Madrid, CIEMAT) ; Paniccia, M (Geneva U.) ; Papi, A (INFN, Perugia ; U. Perugia (main)) ; Pedreschi, E (INFN, Pisa) ; Pensotti, S (INFN, Milan Bicocca ; Milan Bicocca U.) ; Pereira, R (Hawaii U. ; LIP, Lisbon) ; Pilo, F (INFN, Pisa) ; Piluso, A (INFN, Perugia ; U. Perugia (main)) ; Pizzolotto, C (INFN, Perugia) ; Plyaskin, V (MIT) ; Pohl, M (Geneva U.) ; Poireau, V (Annecy, LAPP ; Savoie U. (main)) ; Postaci, E (Middle East Tech. U., Ankara) ; Putze, A (Annecy, LAPP ; Savoie U. (main)) ; Quadrani, L (INFN, Bologna ; U. Bologna (main)) ; Qi, X M (Zhongshan U.) ; Rancoita, P G (INFN, Milan Bicocca) ; Rapin, D (Geneva U.) ; Ricol, J S (LPSC, Grenoble) ; Rodríguez, I (Madrid, CIEMAT) ; Rosier-Lees, S (Annecy, LAPP ; Savoie U. (main)) ; Rozhkov, A (MIT) ; Rozza, D (INFN, Milan Bicocca) ; Sagdeev, R (Maryland U., College Park) ; Sandweiss, J (Yale U.) ; Saouter, P (Geneva U.) ; Sbarra, C (INFN, Bologna ; U. Bologna (main)) ; Schael, S (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Schmidt, S M (Julich, NIC ; JARA-FAME, Jülich) ; Schuckardt, D (Karlsruhe U., EKP) ; Schulz von Dratzig, A (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Schwering, G (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Scolieri, G (INFN, Perugia) ; Seo, E S (Maryland U., College Park) ; Shan, B S (BeiHang U.) ; Shan, Y H (BeiHang U.) ; Shi, J Y (Southeast U., Nanjing) ; Shi, X Y (MIT ; Beijing Normal U.) ; Shi, Y M (Shanghai Jiaotong U.) ; Siedenburg, T (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Son, D (Kyungpook Natl. U., Daegu (Main) ; CHEP, Taegu) ; Spada, F (INFN, Rome) ; Spinella, F (INFN, Pisa) ; Sun, W (MIT) ; Sun, W H (MIT ; Southeast U., Nanjing) ; Tacconi, M (INFN, Milan Bicocca ; Milan Bicocca U.) ; Tang, C P (Zhongshan U.) ; Tang, X W (Beijing, Inst. High Energy Phys.) ; Tang, Z C (Beijing, Inst. High Energy Phys.) ; Tao, L (Annecy, LAPP ; Savoie U. (main)) ; Tescaro, D (IAC, La Laguna) ; Ting, Samuel C C (MIT) ; Ting, S M (MIT) ; Tomassetti, N (LPSC, Grenoble) ; Torsti, J (Turku U.) ; Türkoğlu, C (Middle East Tech. U., Ankara) ; Urban, T (NASA, Houston ; Jacobs-Sverdrup, Houston) ; Vagelli, V (Karlsruhe U., EKP) ; Valente, E (INFN, Rome ; U. Rome La Sapienza (main)) ; Vannini, C (INFN, Pisa) ; Valtonen, E (Turku U.) ; Vaurynovich, S (MIT) ; Vecchi, M (Annecy, LAPP ; Savoie U. (main)) ; Velasco, M (Madrid, CIEMAT) ; Vialle, J P (Annecy, LAPP ; Savoie U. (main)) ; Wang, L Q (Shandong U.) ; Wang, Q L (Inst. Electr. Engin., Beijing) ; Wang, R S (Shanghai Jiaotong U.) ; Wang, X (MIT) ; Wang, Z X (Zhongshan U.) ; Weng, Z L (MIT) ; Whitman, K (Hawaii U.) ; Wienkenhöver, J (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Wu, H (Southeast U., Nanjing) ; Xia, X (Madrid, CIEMAT ; Shandong U.) ; Xie, M (MIT ; Harbin Inst. Tech.) ; Xie, S (Shanghai Jiaotong U.) ; Xiong, R Q (Southeast U., Nanjing) ; Xin, G M (Shandong U.) ; Xu, N S (Zhongshan U.) ; Xu, W (Beijing, Inst. High Energy Phys. ; MIT) ; Yan, Q (Beijing, Inst. High Energy Phys.) ; Yang, J (Ewha Women's U., Seoul) ; Yang, M (Beijing, Inst. High Energy Phys.) ; Ye, Q H (Shanghai Jiaotong U.) ; Yi, H (Southeast U., Nanjing) ; Yu, Y J (Inst. Electr. Engin., Beijing) ; Yu, Z Q (Beijing, Inst. High Energy Phys.) ; Zeissler, S (Karlsruhe U., EKP) ; Zhang, J H (Southeast U., Nanjing) ; Zhang, M T (Zhongshan U.) ; Zhang, X B (Zhongshan U.) ; Zhang, Z (Zhongshan U.) ; Zheng, Z M (BeiHang U.) ; Zhuang, H L (Beijing, Inst. High Energy Phys.) ; Zhukov, V (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Zichichi, A (INFN, Bologna ; U. Bologna (main)) ; Zimmermann, N (Aachen, Tech. Hochsch. ; JARA-FAME, Aachen) ; Zuccon, P (MIT) ; Zurbach, C (U. Montpellier 2, LUPM)

Publication 2014
In: Phys. Rev. Lett. 113 (2014) 121102
DOI 10.1103/PhysRevLett.113.121102
Subject category Particle Physics - Experiment ; Astrophysics and Astronomy
Accelerator/Facility, Experiment AMS RE1
Abstract Precision measurements by the Alpha Magnetic Spectrometer on the International Space Station of the primary cosmic-ray electron flux in the range 0.5 to 700 GeV and the positron flux in the range 0.5 to 500 GeV are presented. The electron flux and the positron flux each require a description beyond a single power-law spectrum. Both the electron flux and the positron flux change their behavior at ∼30  GeV but the fluxes are significantly different in their magnitude and energy dependence. Between 20 and 200 GeV the positron spectral index is significantly harder than the electron spectral index. The determination of the differing behavior of the spectral indices versus energy is a new observation and provides important information on the origins of cosmic-ray electrons and positrons.

Corresponding record in: Inspire
 ჩანაწერი შექმნილია 2014-09-18, ბოლოს შესწორებულია 2016-10-20


APS Published version, local copy:
სრული ტექსტის ჩამოტვირთვა
PDF