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. Academic Article uri icon

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 250GeV, 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.

published proceedings

  • Phys Rev Lett

altmetric score

  • 389.336

author list (cited authors)

  • Aguilar, M., Alberti, G., Alpat, B., Alvino, A., Ambrosi, G., Andeen, K., ... AMS Collaboration.

citation count

  • 752

complete list of authors

  • Aguilar, M||Alberti, G||Alpat, B||Alvino, A||Ambrosi, G||Andeen, K||Anderhub, H||Arruda, L||Azzarello, P||Bachlechner, A||Barao, F||Baret, B||Barrau, A||Barrin, L||Bartoloni, A||Basara, L||Basili, A||Batalha, L||Bates, J||Battiston, R||Bazo, J||Becker, R||Becker, U||Behlmann, M||Beischer, B||Berdugo, J||Berges, P||Bertucci, B||Bigongiari, G||Biland, A||Bindi, V||Bizzaglia, S||Boella, G||de Boer, W||Bollweg, K||Bolmont, J||Borgia, B||Borsini, S||Boschini, MJ||Boudoul, G||Bourquin, M||Brun, P||Buénerd, M||Burger, J||Burger, W||Cadoux, F||Cai, XD||Capell, M||Casadei, D||Casaus, J||Cascioli, V||Castellini, G||Cernuda, I||Cervelli, F||Chae, MJ||Chang, YH||Chen, AI||Chen, CR||Chen, H||Cheng, GM||Chen, HS||Cheng, L||Chernoplyiokov, N||Chikanian, A||Choumilov, E||Choutko, V||Chung, CH||Clark, C||Clavero, R||Coignet, G||Commichau, V||Consolandi, C||Contin, A||Corti, C||Costado Dios, MT||Coste, B||Crespo, D||Cui, Z||Dai, M||Delgado, C||Della Torre, S||Demirkoz, B||Dennett, P||Derome, L||Di Falco, S||Diao, XH||Diago, A||Djambazov, L||Díaz, C||von Doetinchem, P||Du, WJ||Dubois, JM||Duperay, R||Duranti, M||D'Urso, D||Egorov, A||Eline, A||Eppling, FJ||Eronen, T||van Es, J||Esser, H||Falvard, A||Fiandrini, E||Fiasson, A||Finch, E||Fisher, P||Flood, K||Foglio, R||Fohey, M||Fopp, S||Fouque, N||Galaktionov, Y||Gallilee, M||Gallin-Martel, L||Gallucci, G||García, B||García, J||García-López, R||García-Tabares, L||Gargiulo, C||Gast, H||Gebauer, I||Gentile, S||Gervasi, M||Gillard, W||Giovacchini, F||Girard, L||Goglov, P||Gong, J||Goy-Henningsen, C||Grandi, D||Graziani, M||Grechko, A||Gross, A||Guerri, I||de la Guía, C||Guo, KH||Habiby, M||Haino, S||Hauler, F||He, ZH||Heil, M||Heilig, J||Hermel, R||Hofer, H||Huang, ZC||Hungerford, W||Incagli, M||Ionica, M||Jacholkowska, A||Jang, WY||Jinchi, H||Jongmanns, M||Journet, L||Jungermann, L||Karpinski, W||Kim, GN||Kim, KS||Kirn, Th||Kossakowski, R||Koulemzine, A||Kounina, O||Kounine, A||Koutsenko, V||Krafczyk, MS||Laudi, E||Laurenti, G||Lauritzen, C||Lebedev, A||Lee, MW||Lee, SC||Leluc, C||León Vargas, H||Lepareur, V||Li, JQ||Li, Q||Li, TX||Li, W||Li, ZH||Lipari, P||Lin, CH||Liu, D||Liu, H||Lomtadze, T||Lu, YS||Lucidi, S||Lübelsmeyer, K||Luo, JZ||Lustermann, W||Lv, S||Madsen, J||Majka, R||Malinin, A||Mañá, C||Marín, J||Martin, T||Martínez, G||Masciocchi, F||Masi, N||Maurin, D||McInturff, A||McIntyre, P||Menchaca-Rocha, A||Meng, Q||Menichelli, M||Mereu, I||Millinger, M||Mo, DC||Molina, M||Mott, P||Mujunen, A||Natale, S||Nemeth, P||Ni, JQ||Nikonov, N||Nozzoli, F||Nunes, P||Obermeier, A||Oh, S||Oliva, A||Palmonari, F||Palomares, C||Paniccia, M||Papi, A||Park, WH||Pauluzzi, M||Pauss, F||Pauw, A||Pedreschi, E||Pensotti, S||Pereira, R||Perrin, E||Pessina, G||Pierschel, G||Pilo, F||Piluso, A||Pizzolotto, C||Plyaskin, V||Pochon, J||Pohl, M||Poireau, V||Porter, S||Pouxe, J||Putze, A||Quadrani, L||Qi, XN||Rancoita, PG||Rapin, D||Ren, ZL||Ricol, JS||Riihonen, E||Rodríguez, I||Roeser, U||Rosier-Lees, S||Rossi, L||Rozhkov, A||Rozza, D||Sabellek, A||Sagdeev, R||Sandweiss, J||Santos, B||Saouter, P||Sarchioni, M||Schael, S||Schinzel, D||Schmanau, M||Schwering, G||Schulz von Dratzig, A||Scolieri, G||Seo, ES||Shan, BS||Shi, JY||Shi, YM||Siedenburg, T||Siedling, R||Son, D||Spada, F||Spinella, F||Steuer, M||Stiff, K||Sun, W||Sun, WH||Sun, XH||Tacconi, M||Tang, CP||Tang, XW||Tang, ZC||Tao, L||Tassan-Viol, J||Ting, Samuel CC||Ting, SM||Titus, C||Tomassetti, N||Toral, F||Torsti, J||Tsai, JR||Tutt, JC||Ulbricht, J||Urban, T||Vagelli, V||Valente, E||Vannini, C||Valtonen, E||Vargas Trevino, M||Vaurynovich, S||Vecchi, M||Vergain, M||Verlaat, B||Vescovi, C||Vialle, JP||Viertel, G||Volpini, G||Wang, D||Wang, NH||Wang, QL||Wang, RS||Wang, X||Wang, ZX||Wallraff, W||Weng, ZL||Willenbrock, M||Wlochal, M||Wu, H||Wu, KY||Wu, ZS||Xiao, WJ||Xie, S||Xiong, RQ||Xin, GM||Xu, NS||Xu, W||Yan, Q||Yang, J||Yang, M||Ye, QH||Yi, H||Yu, YJ||Yu, ZQ||Zeissler, S||Zhang, JG||Zhang, Z||Zhang, MM||Zheng, ZM||Zhuang, HL||Zhukov, V||Zichichi, A||Zuccon, P||Zurbach, C

publication date

  • April 2013