1. 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
- Author
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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, de Boer, W, Bollweg, K, Bolmont, J, Borgia, B. Borsini, S, Boschini, MJ, Boudoul, G, Bourquin, M, Brun, P, Buenerd, 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, Dios, MT, Costado 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, Diaz, 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, Garcia, B, Garcia, J, Garcia Lopez, R, Garcia Tabares, L, Gargiulo, C, Gast, H, Gebauer, I, Gentile, S, 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 Guia, 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, Vargas, HL, 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, Luebelsmeyer, K, Luo, JZ, Lustermann, W, Lv, S, Madsen, J, Majka, R, Malinin, A, Mana, C, Marin, J, Martin, T, Martinez, 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, Pereira, R, Perrin, E, 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, Rodriguez, I, Roeser, U, Rosier Lees, S, Rossi, L, Rozhkov, A, ROZZA, DAVIDE, Sabellek, A, Sagdeev, R, Sandweiss, J, Santos, B, Saouter, P, Sarchioni, M, Schael, S, Schinzel, D, Schmanau, M, Schwering, G, von Dratzig, AS, 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, 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, Trevino, MV, 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., BOELLA, GIULIANO FILIPPO, GERVASI, MASSIMO, PENSOTTI, SIMONETTA, PESSINA, GIANLUIGI EZIO, TACCONI, MAURO, M. Aguilar, G. Alberti, B. Alpat, A. Alvino, G. Ambrosi, K. Andeen, H. Anderhub, L. Arruda, P. Azzarello, A. Bachlechner, F. Barao, B. Baret, A. Barrau, L. Barrin, A. Bartoloni, L. Basara, A. Basili, L. Batalha, J. Bate, R. Battiston, J. Bazo, R. Becker, U. Becker, M. Behlmann, B. Beischer, J. Berdugo, P. Berge, B. Bertucci, G. Bigongiari, A. Biland, V. Bindi, S. Bizzaglia, G. Boella, W. de Boer, K. Bollweg, J. Bolmont, B. Borgia, S. Borsini, M. J. Boschini, G. Boudoul, M. Bourquin, P. Brun, M. Buénerd, J. Burger, W. Burger, F. Cadoux, X. D. Cai, M. Capell, D. Casadei, J. Casau, V. Cascioli, G. Castellini, I. Cernuda, F. Cervelli, M. J. Chae, Y. H. Chang, A. I. Chen, C. R. Chen, H. Chen, G. M. Cheng, H. S. Chen, L. Cheng, N. Chernoplyiokov, A. Chikanian, E. Choumilov, V. Choutko, C. H. Chung, C. Clark, R. Clavero, G. Coignet, V. Commichau, C. Consolandi, A. Contin, C. Corti, M. T. Costado Dio, B. Coste, D. Crespo, Z. Cui, M. Dai, C. Delgado, S. Della Torre, B. Demirkoz, P. Dennett, L. Derome, S. Di Falco, X. H. Diao, A. Diago, L. Djambazov, C. Díaz, P. von Doetinchem, W. J. Du, J. M. Duboi, R. Duperay, M. Duranti, D. D’Urso, A. Egorov, A. Eline, F. J. Eppling, T. Eronen, J. van E, H. Esser, A. Falvard, E. Fiandrini, A. Fiasson, E. Finch, P. Fisher, K. Flood, R. Foglio, M. Fohey, S. Fopp, N. Fouque, Y. Galaktionov, M. Gallilee, L. Gallin-Martel, G. Gallucci, B. García, J. García, R. García-López, L. García-Tabare, C. Gargiulo, H. Gast, I. Gebauer, S. Gentile, M. Gervasi, W. Gillard, F. Giovacchini, L. Girard, P. Goglov, J. Gong, C. Goy-Henningsen, D. Grandi, M. Graziani, A. Grechko, A. Gro, I. Guerri, C. de la Guía, K. H. Guo, M. Habiby, S. Haino, F. Hauler, Z. H. He, M. Heil, J. Heilig, R. Hermel, H. Hofer, Z. C. Huang, W. Hungerford, M. Incagli, M. Ionica, A. Jacholkowska, W. Y. Jang, H. Jinchi, M. Jongmann, L. Journet, L. Jungermann, W. Karpinski, G. N. Kim, K. S. Kim, Th. Kirn, R. Kossakowski, A. Koulemzine, O. Kounina, A. Kounine, V. Koutsenko, M. S. Krafczyk, E. Laudi, G. Laurenti, C. Lauritzen, A. Lebedev, M. W. Lee, S. C. Lee, C. Leluc, H. León Varga, V. Lepareur, J. Q. Li, Q. Li, T. X. Li, W. Li, Z. H. Li, P. Lipari, C. H. Lin, D. Liu, H. Liu, T. Lomtadze, Y. S. Lu, S. Lucidi, K. Lübelsmeyer, J. Z. Luo, W. Lustermann, S. Lv, J. Madsen, R. Majka, A. Malinin, C. Mañá, J. Marín, T. Martin, G. Martínez, F. Masciocchi, N. Masi, D. Maurin, A. McInturff, P. McIntyre, A. Menchaca-Rocha, Q. Meng, M. Menichelli, I. Mereu, M. Millinger, D. C. Mo, M. Molina, P. Mott, A. Mujunen, S. Natale, P. Nemeth, J. Q. Ni, N. Nikonov, F. Nozzoli, P. Nune, A. Obermeier, S. Oh, A. Oliva, F. Palmonari, C. Palomare, M. Paniccia, A. Papi, W. H. Park, M. Pauluzzi, F. Pau, A. Pauw, E. Pedreschi, S. Pensotti, R. Pereira, E. Perrin, G. Pessina, G. Pierschel, F. Pilo, A. Piluso, C. Pizzolotto, V. Plyaskin, J. Pochon, M. Pohl, V. Poireau, S. Porter, J. Pouxe, A. Putze, L. Quadrani, X. N. Qi, P. G. Rancoita, D. Rapin, Z. L. Ren, J. S. Ricol, E. Riihonen, I. Rodríguez, U. Roeser, S. Rosier-Lee, L. Rossi, A. Rozhkov, D. Rozza, A. Sabellek, R. Sagdeev, J. Sandwei, B. Santo, P. Saouter, M. Sarchioni, S. Schael, D. Schinzel, M. Schmanau, G. Schwering, A. Schulz von Dratzig, G. Scolieri, E. S. Seo, B. S. Shan, J. Y. Shi, Y. M. Shi, T. Siedenburg, R. Siedling, D. Son, F. Spada, F. Spinella, M. Steuer, K. Stiff, W. Sun, W. H. Sun, X. H. Sun, M. Tacconi, C. P. Tang, X. W. Tang, Z. C. Tang, L. Tao, J. Tassan-Viol, Samuel C. C. Ting, S. M. Ting, C. Titu, N. Tomassetti, F. Toral, J. Torsti, J. R. Tsai, J. C. Tutt, J. Ulbricht, T. Urban, V. Vagelli, E. Valente, C. Vannini, E. Valtonen, M. Vargas Trevino, S. Vaurynovich, M. Vecchi, M. Vergain, B. Verlaat, C. Vescovi, J. P. Vialle, G. Viertel, G. Volpini, D. Wang, N. H. Wang, Q. L. Wang, R. S. Wang, X. Wang, Z. X. Wang, W. Wallraff, Z. L. Weng, M. Willenbrock, M. Wlochal, H. Wu, K. Y. Wu, Z. S. Wu, W. J. Xiao, 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. G. Zhang, Z. Zhang, M. M. Zhang, Z. M. Zheng, H. L. Zhuang, V. Zhukov, A. Zichichi, P. Zuccon, C. Zurbach, Azzarello, Philipp, Bourquin, Maurice, Cadoux, Franck, Habiby Alaoui, Marion, Leluc, Catherine, Masciocchi, Florian, Paniccia, Mercedes, Perrin, Eric, Pohl, Martin, Rapin, Divic Jean, Saouter, Pierre, Metsähovi Radio Observatory, Aalto-yliopisto, Aalto University, OpenMETU, CERN [Genève], Centro de Investigaciones Energéticas Medioambientales y Tecnológicas [Madrid] (CIEMAT), Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (INFN, Sezione di Perugia), Istituto Nazionale di Fisica Nucleare (INFN), Karlsruhe Institute of Technology (KIT), Institute for Theoretical Physics [ETH Zürich] (ITP), Department of Physics [ETH Zürich] (D-PHYS), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)- Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), RWTH Aachen University, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Massachusetts Institute of Technology (MIT), Laboratoire Univers et Particules de Montpellier (LUPM), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Montpellier 2 - Sciences et Techniques (UM2), Département de Physique Nucléaire et Corpusculaire [Genève] (DPNC), Université de Genève (UNIGE), Istituto Nazionale di Fisica Nucleare, Sezione di Bologna (INFN, Sezione di Bologna), Instituto de Astrofisica de Canarias (IAC), Instituto de Matematicas (UNAM), Universidad Nacional Autónoma de México (UNAM), Istituto Nazionale di Fisica Nucleare [Sezione di Roma 1] (INFN), Istituto Nazionale di Fisica Nucleare, INFN Sezione di Pisa (INFN Sezione di Pisa), Istituto Nazionale di Fisica Nucleare, Sezione di Milano (INFN), AMS, 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., B, S, Boschini, M, Boudoul, G, Bourquin, M, Brun, P, Buenerd, M, Burger, J, Burger, W, Cadoux, F, Cai, X, Capell, M, Casadei, D, Casaus, J, Cascioli, V, Castellini, G, Cernuda, I, Cervelli, F, Chae, M, Chang, Y, Chen, A, Chen, C, Chen, H, Cheng, G, Cheng, L, Chernoplyiokov, N, Chikanian, A, Choumilov, E, Choutko, V, Chung, C, Clark, C, Clavero, R, Coignet, G, Commichau, V, Consolandi, C, Contin, A, Corti, C, Dios, M, Costado Coste, B, Crespo, D, Cui, Z, Dai, M, Delgado, C, Della Torre, S, Demirkoz, B, Dennett, P, Derome, L, Di Falco, S, Diao, X, Diago, A, Djambazov, L, Diaz, C, von Doetinchem, P, Du, W, Dubois, J, Duperay, R, Duranti, M, D'Urso, D, Egorov, A, Eline, A, Eppling, F, 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, Garcia, B, Garcia, J, Garcia Lopez, R, Garcia 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 Guia, C, Guo, K, Habiby, M, Haino, S, Hauler, F, He, Z, Heil, M, Heilig, J, Hermel, R, Hofer, H, Huang, Z, Hungerford, W, Incagli, M, Ionica, M, Jacholkowska, A, Jang, W, Jinchi, H, Jongmanns, M, Journet, L, Jungermann, L, Karpinski, W, Kim, G, Kim, K, Kirn, T, Kossakowski, R, Koulemzine, A, Kounina, O, Kounine, A, Koutsenko, V, Krafczyk, M, Laudi, E, Laurenti, G, Lauritzen, C, Lebedev, A, Lee, M, Lee, S, Leluc, C, Vargas, H, Lepareur, V, Li, J, Li, Q, Li, T, Li, W, Li, Z, Lipari, P, Lin, C, Liu, D, Liu, H, Lomtadze, T, Lu, Y, Lucidi, S, Luebelsmeyer, K, Luo, J, Lustermann, W, Lv, S, Madsen, J, Majka, R, Malinin, A, Mana, C, Marin, J, Martin, T, Martinez, G, Masciocchi, F, Masi, N, Maurin, D, Mcinturff, A, Mcintyre, P, Menchaca Rocha, A, Meng, Q, Menichelli, M, Mereu, I, Millinger, M, Mo, D, Molina, M, Mott, P, Mujunen, A, Natale, S, Nemeth, P, Ni, J, Nikonov, N, Nozzoli, F, Nunes, P, Obermeier, A, Oh, S, Oliva, A, Palmonari, F, Palomares, C, Paniccia, M, Papi, A, Park, W, 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, X, Rancoita, P, Rapin, D, Ren, Z, Ricol, J, Riihonen, E, Rodriguez, 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, von Dratzig, A, Scolieri, G, Seo, E, Shan, B, Shi, J, Shi, Y, Siedenburg, T, Siedling, R, Son, D, Spada, F, Spinella, F, Steuer, M, Stiff, K, Sun, W, Sun, X, Tacconi, M, Tang, C, Tang, X, Tang, Z, Tao, L, Tassan Viol, J, Ting, S, Titus, C, Tomassetti, N, Toral, F, Torsti, J, Tsai, J, Tutt, J, Ulbricht, J, Urban, T, Vagelli, V, Valente, E, Vannini, C, Valtonen, E, Trevino, M, Vaurynovich, S, Vecchi, M, Vergain, M, Verlaat, B, Vescovi, C, Vialle, J, Viertel, G, Volpini, G, Wang, D, Wang, N, Wang, Q, Wang, R, Wang, X, Wang, Z, Wallraff, W, Weng, Z, Willenbrock, M, Wlochal, M, Wu, H, Wu, K, Wu, Z, Xiao, W, Xie, S, Xiong, R, Xin, G, Xu, N, Xu, W, Yan, Q, Yang, J, Yang, M, Ye, Q, Yi, H, Yu, Y, Yu, Z, Zeissler, S, Zhang, J, Zhang, Z, Zhang, M, Zheng, Z, Zhuang, H, Zhukov, V, Zichichi, A, Zuccon, P, and Zurbach, C
- Subjects
[PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE] ,Astrophysics::High Energy Astrophysical Phenomena ,education ,Dark matter ,General Physics and Astronomy ,Electrons ,Cosmic ray ,ddc:500.2 ,Electron ,01 natural sciences ,and other elementary particle detectors ,cosmic ray detectors ,Nuclear physics ,Physics and Astronomy (all) ,Positron ,cosmic rays ,muon ,Neutrino ,0103 physical sciences ,Alpha Magnetic Spectrometer ,010306 general physics ,Anisotropy ,Physics ,Range (particle radiation) ,ta115 ,ta213 ,ta114 ,Cosmic rays, positron fraction, space experiments ,010308 nuclear & particles physics ,[SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE] ,pion ,Observable ,energy spectra and interactions ,pion, and other elementary particle detectors ,ELECTRONS ,cosmic rays, dark matter ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Composition - 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 x 10(6) positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 to similar to 250 GeV, 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. DOI: 10.1103/PhysRevLett.110.141102
- Published
- 2013
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