Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station

M. Aguilar L. Ali Cavasonza B. Alpat G. Ambrosi L. Arruda N. Attig S. Aupetit 1 P. Azzarello A. Bachlechner F. Barao A. Barrau 1 L. Barrin A. Bartoloni L. Basara S. Başeǧmez-Du Pree M. Battarbee R. Battiston J. Bazo U. Becker M. Behlmann B. Beischer J. Berdugo B. Bertucci V. Bindi G. Boella W. De Boer K. Bollweg V. Bonnivard 1 B. Borgia M. j. Boschini M. Bourquin E. f. Bueno J. Burger F. Cadoux X. d. Cai M. Capell S. Caroff 2 J. Casaus G. Castellini I. Cernuda F. Cervelli M. j. Chae Y. h. Chang A. i. Chen G. m. Chen H. s. Chen L. Cheng H. y. Chou E. Choumilov V. Choutko C. h. Chung C. Clark R. Clavero G. Coignet 2 C. Consolandi A. Contin C. Corti B. Coste W. Creus M. Crispoltoni Z. Cui Y. m. Dai C. Delgado S. Della Torre M. b. Demirköz L. Derome 1 S. Di Falco F. Dimiccoli C. Díaz P. Von Doetinchem F. Dong F. Donnini M. Duranti D. D’urso A. Egorov A. Eline T. Eronen J. Feng E. Fiandrini E. Finch P. Fisher V. Formato Y. Galaktionov G. Gallucci B. García R. j. García-López C. Gargiulo H. Gast I. Gebauer M. Gervasi A. Ghelfi 1 F. Giovacchini P. Goglov D. m. Gómez-Coral J. Gong C. Goy 2 V. Grabski D. Grandi M. Graziani I. Guerri K. h. Guo M. Habiby S. Haino K. c. Han Z. h. He M. Heil J. Hoffman T. h. Hsieh H. Huang Z. c. Huang C. Huh M. Incagli M. Ionica W. y. Jang H. Jinchi S. c. Kang K. Kanishev G. n. Kim K. s. Kim Th. Kirn C. Konak O. Kounina A. Kounine V. Koutsenko M. s. Krafczyk G. La Vacca E. Laudi G. Laurenti I. Lazzizzera A. Lebedev H. t. Lee S. c. Lee C. Leluc H. s. Li J. q. Li Q. Li T. x. Li W. Li Z. h. Li Z. y. Li S. Lim C. h. Lin P. Lipari T. Lippert D. Liu Hu Liu S. q. Lu Y. s. Lu K. Luebelsmeyer F. Luo J. z. Luo S. s. Lv R. Majka C. Mañá J. Marín T. Martin G. Martínez N. Masi D. Maurin A. Menchaca-Rocha Q. Meng D. c. Mo L. Morescalchi P. Mott T. Nelson J. q. Ni N. Nikonov F. Nozzoli P. Nunes A. Oliva M. Orcinha F. Palmonari C. Palomares M. Paniccia M. Pauluzzi S. Pensotti R. Pereira N. Picot-Clemente F. Pilo C. Pizzolotto V. Plyaskin M. Pohl V. Poireau 2 A. Putze 2 L. Quadrani X. m. Qi X. Qin Z. y. Qu T. Räihä P. g. Rancoita D. Rapin J. s. Ricol 1 I. Rodríguez S. Rosier-Lees 2 A. Rozhkov D. Rozza R. Sagdeev J. Sandweiss P. Saouter S. Schael S. m. Schmidt A. Schulz von Dratzig G. Schwering E. s. Seo B. s. Shan J. y. Shi T. Siedenburg D. Son J. w. Song W. h. Sun M. Tacconi X. w. Tang Z. c. Tang L. Tao 2 D. Tescaro Samuel C. c. Ting S. m. Ting N. Tomassetti 1 J. Torsti C. Türkoğlu T. Urban V. Vagelli E. Valente C. Vannini E. Valtonen M. Vázquez Acosta M. Vecchi M. Velasco J. p. Vialle 2 V. Vitale S. Vitillo L. q. Wang N. h. Wang Q. l. Wang X. Wang X. Q. Wang Z. x. Wang C. c. Wei Z. l. Weng K. Whitman J. Wienkenhöver M. Willenbrock H. Wu X. Wu X. Xia R. q. Xiong W. Xu Q. Yan J. Yang M. Yang Y. Yang H. Yi Y. j. Yu Z. q. Yu S. Zeissler C. Zhang J. Zhang J. h. Zhang S. d. Zhang S. w. Zhang Zhongkai Zhang Z. m. Zheng Z. q. Zhu H. l. Zhuang V. Zhukov A. Zichichi N. Zimmermann P. Zuccon
Abstract : A precision measurement by AMS of the antiproton flux and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV is presented based on 3.49 × 105 antiproton events and 2.42 × 109 proton events. The fluxes and flux ratios of charged elementary particles in cosmic rays are also presented. In the absolute rigidity range ∼60 to ∼500 GV, the antiproton ¯p, proton p, and positron eþ fluxes are found to have nearly identical rigidity dependence and the electron e− flux exhibits a different rigidity dependence. Below 60 GV, the ( ¯ p=p), ( ¯ p=eþ), and (p=eþ) flux ratios each reaches a maximum. From ∼60 to ∼500 GV, the ( ¯ p=p), ( ¯ p=eþ), and (p=eþ) flux ratios show no rigidity dependence. These are new observations of the properties of elementary particles in the cosmos.
Type de document :
Article dans une revue
Physical Review Letters, American Physical Society, 2016, 117, pp.091103. 〈10.1103/PhysRevLett.117.091103〉
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Soumis le : lundi 29 août 2016 - 10:45:21
Dernière modification le : lundi 9 avril 2018 - 12:22:08

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M. Aguilar, L. Ali Cavasonza, B. Alpat, G. Ambrosi, L. Arruda, et al.. Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station. Physical Review Letters, American Physical Society, 2016, 117, pp.091103. 〈10.1103/PhysRevLett.117.091103〉. 〈in2p3-01357099〉

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