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Towards Understanding the Origin of Cosmic-Ray Positrons

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Autor(es):
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Aguilar, M. [1] ; Cavasonza, L. Ali [2, 3] ; Ambrosi, G. [4] ; Arruda, L. [5] ; Attig, N. [6, 7] ; Azzarello, P. [8] ; Bachlechner, A. [2, 3] ; Barao, F. [5] ; Barrau, A. [9] ; Barrin, L. [10] ; Bartoloni, A. [11] ; Basara, L. [12] ; Basegmez-du Pree, S. [13] ; Battiston, R. [14, 12, 15] ; Becker, U. [16] ; Behlmann, M. [16] ; Beischer, B. [2, 3] ; Berdugo, J. [1] ; Bertucci, B. [17, 4] ; Bindi, V. [18] ; de Boer, W. [19] ; Bollweg, K. [20, 21] ; Borgia, B. [11, 22] ; Boschini, M. J. [23] ; Bourquin, M. [8] ; Bueno, E. F. [24] ; Burger, J. [16] ; Burger, W. J. [12] ; Cai, X. D. [16] ; Capell, M. [16] ; Caroff, S. [25] ; Casaus, J. [1] ; Castellini, G. [26] ; Cervelli, F. [27] ; Chang, Y. H. [28, 29] ; Chen, G. M. [30] ; Chen, H. S. [30, 31] ; Chen, Y. [8] ; Cheng, L. [32] ; Chou, H. Y. [28, 29] ; Choutko, V. [16] ; Chung, C. H. [2, 3] ; Clark, C. [20, 21] ; Coignet, G. [25] ; Consolandi, C. [18] ; Contin, A. [33, 34] ; Corti, C. [18] ; Crispoltoni, M. [17, 4] ; Cui, Z. [32] ; Dadzie, K. [16] ; Dai, Y. M. [35] ; Datta, A. [18] ; Delgado, C. [1] ; Della Torre, S. [23] ; Demirkoz, M. B. [36] ; Derome, L. [9] ; Di Falco, S. [27] ; Dimiccoli, F. [10, 12] ; Diaz, C. [1] ; von Doetinchem, P. [18] ; Dong, F. [37] ; Donnini, F. [4, 38] ; Duranti, M. [4] ; Egorov, A. [16] ; Eline, A. [16] ; Eronen, T. [39] ; Feng, J. [16] ; Fiandrini, E. [17, 4] ; Fisher, P. [16] ; Formato, V. [4] ; Galaktionov, Y. [16] ; Garcia-Lopez, R. J. [40, 41] ; Gargiulo, C. [10] ; Gast, H. [2, 3] ; Gebauer, I. [19] ; Gervasi, M. [23, 42] ; Giovacchini, F. [1] ; Gomez-Coral, D. M. [43] ; Gong, J. [37] ; Goy, C. [25] ; Grabski, V. [43] ; Grandi, D. [23, 42] ; Graziani, M. [19] ; Guo, K. H. [44] ; Haino, S. [45] ; Han, K. C. [46] ; He, Z. H. [44] ; Heil, M. [16] ; Hsieh, T. H. [16] ; Huang, H. [45, 47] ; Huang, Z. C. [44] ; Incagli, M. [27] ; Jia, Yi [16] ; Jinchi, H. [46] ; Kanishev, K. [12] ; Khiali, B. [4, 38] ; Kirn, Th. [2, 3] ; Konak, C. [36] ; Kounina, O. [16] ; Kounine, A. [16] ; Koutsenko, V. [16] ; Kulemzin, A. [16] ; La Vacca, G. [23, 42] ; Laudi, E. [10] ; Laurenti, G. [33] ; Lazzizzera, I. [12, 15] ; Lebedev, A. [16] ; Lee, H. T. [48] ; Lee, S. C. [45] ; Leluc, C. [8] ; Li, J. Q. [37] ; Li, Q. [37] ; Li, T. X. [44] ; Li, Z. H. [30] ; Light, C. [18] ; Lin, C. H. [45] ; Lippert, T. [6, 7] ; Liu, F. Z. [16] ; Liu, Hu [16, 28, 29] ; Liu, Z. [8] ; Lu, S. Q. [44, 45] ; Lu, Y. S. [30] ; Luebelsmeyer, K. [2, 3] ; Luo, F. [32] ; Luo, J. Z. [37] ; Luo, Xi [18] ; Lyu, S. S. [44] ; Machate, F. [2, 3] ; Mana, C. [1] ; Marin, J. [1] ; Martin, T. [20, 21] ; Martinez, G. [1] ; Masi, N. [33] ; Maurin, D. [9] ; Menchaca-Rocha, A. [43] ; Meng, Q. [37] ; Mo, D. C. [44] ; Molero, M. [1] ; Mott, P. [20, 21] ; Mussolin, L. [17, 4] ; Nelson, T. [18] ; Ni, J. Q. [44] ; Nikonov, N. [2, 3] ; Nozzoli, F. [12] ; Oliva, A. [1] ; Orcinha, M. [5] ; Palermo, M. [18] ; Palmonari, F. [33, 34] ; Paniccia, M. [8] ; Pashnin, A. [16] ; Pauluzzi, M. [17, 4] ; Pensotti, S. [23, 42] ; Perrina, C. [8] ; Phan, H. D. [16] ; Picot-Clemente, N. [49] ; Plyaskin, V. [16] ; Pohl, M. [8] ; Poireau, V. [25] ; Popkow, A. [18] ; Quadrani, L. [33, 34] ; Qi, X. M. [44] ; Qin, X. [16] ; Qu, Z. Y. [45, 50] ; Rancoita, P. G. [23] ; Rapin, D. [8] ; Reina Conde, A. [40, 41] ; Rosier-Lees, S. [25] ; Rozhkov, A. [16] ; Rozza, D. [23, 42] ; Sagdeev, R. [51] ; Solano, C. [16] ; Schael, S. [2, 3] ; Schmidt, S. M. [6, 7] ; von Dratzig, A. Schulz [2, 3] ; Schwering, G. [2, 3] ; Seo, E. S. [49] ; Shan, B. S. [52] ; Shi, J. Y. [37] ; Siedenburg, T. [2, 3] ; Song, J. W. [32] ; Sun, Z. T. [30] ; Tacconi, M. [23, 42] ; Tang, X. W. [30] ; Tang, Z. C. [30] ; Tian, J. [17, 4] ; Ting, Samuel C. C. [10, 16] ; Ting, S. M. [16] ; Tomassetti, N. [17, 4] ; Torsti, J. [39] ; Urban, T. [20, 21] ; Vagelli, V. [17, 4] ; Valente, E. [11, 22] ; Valtonen, E. [39] ; Vazquez Acosta, M. [40, 41] ; Vecchi, M. [13, 24] ; Velasco, M. [1] ; Vialle, J. P. [25] ; Vizan, J. [1] ; Wang, L. Q. [32] ; Wang, N. H. [32] ; Wang, Q. L. [35] ; Wang, X. [16] ; Wang, X. Q. [30, 31] ; Wang, Z. X. [44] ; Wei, J. [8] ; Weng, Z. L. [16] ; Wu, H. [37] ; Xiong, R. Q. [37] ; Xu, W. [16] ; Yan, Q. [16] ; Yang, Y. [53] ; Yi, H. [37] ; Yu, Y. J. [35] ; Yu, Z. Q. [30] ; Zannoni, M. [23, 42] ; Zeissler, S. [19] ; Zhang, C. [30] ; Zhang, F. [30] ; Zhang, J. H. [37] ; Zhang, Z. [16] ; Zhao, F. [30, 31] ; Zheng, Z. M. [52] ; Zhuang, H. L. [30] ; Zhukov, V. [2, 3] ; Zichichi, A. [33, 34] ; Zimmermann, N. [2, 3] ; Zuccon, P. [12, 15] ; Collaboration, AMS
Número total de Autores: 228
Afiliação do(s) autor(es):
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[1] Ctr Invest Energet Med Medioambientales & Tecnol, E-28040 Madrid - Spain
[2] Rhein Westfal TH Aachen, Inst Phys 1, D-52056 Aachen - Germany
[3] Rhein Westfal TH Aachen, JARA FAME, D-52056 Aachen - Germany
[4] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia - Italy
[5] Lab Instrumentacao & Fis Expt Particulas LIP, P-1000 Lisbon - Portugal
[6] Res Ctr Julich, JARA FAME, D-52425 Julich - Germany
[7] Res Ctr Julich, Julich Supercomp Ctr, D-52425 Julich - Germany
[8] Univ Geneva, DPNC, CH-1211 Geneva 4 - Switzerland
[9] Univ Grenoble Alpes, CNRS, Grenoble INP, LPSC, IN2P3, F-38000 Grenoble - France
[10] CERN, European Org Nucl Res, CH-1211 Geneva 23 - Switzerland
[11] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome - Italy
[12] Ist Nazl Fis Nucl, TIFPA, I-38123 Povo, Trento - Italy
[13] Univ Groningen, KVI Ctr Adv Radiat Technol, NL-9700 AB Groningen - Netherlands
[14] ASI, I-00133 Rome - Italy
[15] Univ Trento, I-38123 Povo, Trento - Italy
[16] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 - USA
[17] Univ Perugia, I-06100 Perugia - Italy
[18] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 - USA
[19] Karlsruhe Inst Technol, Inst Expt Teilchenphys, D-76131 Karlsruhe - Germany
[20] Jacobs Engn, Johnson Space Ctr, Natl Aeronaut & Space Adm, Houston, TX 77058 - USA
[21] Business Integra, Houston, TX 77058 - USA
[22] Univ Roma La Sapienza, I-00185 Rome - Italy
[23] Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20126 Milan - Italy
[24] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13560970 Sao Paulo, SP - Brazil
[25] Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, LAPP, IN2P3, F-74000 Annecy - France
[26] CNR, IROE, I-50125 Florence - Italy
[27] Ist Nazl Fis Nucl, Sez Pisa, I-56100 Pisa - Italy
[28] Natl Cent Univ, Phys Dept, Tao Yuan 32054 - Taiwan
[29] Natl Cent Univ, Ctr High Energy & High Field, Tao Yuan 32054 - Taiwan
[30] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049 - Peoples R China
[31] Univ Chinese Acad Sci, Beijing 100049 - Peoples R China
[32] Shandong Univ SDU, Jinan 250100, Shandong - Peoples R China
[33] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna - Italy
[34] Univ Bologna, I-40126 Bologna - Italy
[35] Chinese Acad Sci, Inst Elect Engn, Beijing 100190 - Peoples R China
[36] Middle East Tech Univ, Dept Phys, TR-06800 Ankara - Turkey
[37] Southeast Univ SEU, Nanjing 210096, Jiangsu - Peoples R China
[38] ASI, Space Sci Data Ctr, I-00133 Rome - Italy
[39] Univ Turku, Dept Phys & Astron, Space Res Lab, FI-20014 Turku - Finland
[40] Inst Astrofis Canarias, E-38205 San Cristobal la Laguna - Spain
[41] Univ La Laguna, Dept Astrofis, E-38206 Tenerife - Spain
[42] Univ Milano Bicocca, I-20126 Milan - Italy
[43] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF - Mexico
[44] Sun Yat Sen Univ, Guangzhou 510275, Guangdong - Peoples R China
[45] Acad Sinica, Inst Phys, Taipei 11529 - Taiwan
[46] NCSIST, Longtan 32546, Tao Yuan - Taiwan
[47] Wuhan Univ, Wuhan 430072, Hubei - Peoples R China
[48] Acad Sinica, Grid Ctr, Taipei 11529 - Taiwan
[49] Univ Maryland, IPST, College Pk, MD 20742 - USA
[50] Nankai Univ, Tianjin 300071 - Peoples R China
[51] Univ Maryland, East West Ctr Space Sci, College Pk, MD 20742 - USA
[52] Beihang Univ BUAA, Beijing 100191 - Peoples R China
[53] Natl Cheng Kung Univ, Tainan 70101 - Taiwan
Número total de Afiliações: 53
Tipo de documento: Artigo Científico
Fonte: Physical Review Letters; v. 122, n. 4 JAN 29 2019.
Citações Web of Science: 17
Resumo

Precision measurements of cosmic ray positrons are presented up to 1 TeV based on 1.9 million positrons collected by the Alpha Magnetic Spectrometer on the International Space Station. The positron flux exhibits complex energy dependence. Its distinctive properties are (a) a significant excess starting from 25.2 +/- 1.8 GeV compared to the lower-energy, power-law trend, (b) a sharp dropoff above 284(-64)(+91) GeV, (c) in the entire energy range the positron flux is well described by the sum of a term associated with the positrons produced in the collision of cosmic rays, which dominates at low energies, and a new source term of positrons, which dominates at high energies, and (d) a finite energy cutoff of the source term of E-s = 810(-180)(+310) GeV is established with a significance of more than 4 sigma. These experimental data on cosmic ray positrons show that, at high energies, they predominantly originate either from dark matter annihilation or from other astrophysical sources. (AU)

Processo FAPESP: 14/19149-7 - Busca indireta de matéria escura com o detector AMS-02
Beneficiário:Manuela Vecchi
Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores