A1 Refereed original research article in a scientific journal

Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station




AuthorsM. Aguilar, D. Aisa, B. Alpat, A. Alvino, G. Ambrosi, K. Andeen, L. Arruda, N. Attig, P. Azzarello, A. Bachlechner, F. Barao, A. Barrau, L. Barrin, A. Bartoloni, L. Basara, M. Battarbee, R. Battiston, J. Bazo, U. Becker, M. Behlmann, B. Beischer, J. Berdugo, B. Bertucci, G. Bigongiari, V. Bindi, S. Bizzaglia, M. Bizzarri, G. Boella, W. de Boer, K. Bollweg, V. Bonnivard, B. Borgia, S. Borsini, M.J. Boschini, M. Bourquin, J. Burger, F. Cadoux, X.D. Cai, M. Capell, S. Caroff, J. Casaus, V. Cascioli, G. Castellini, I. Cernuda, D. Cerreta, F. Cervelli, M.J. Chae, Y.H. Chang, A.I. Chen, H. Chen, G.M. Cheng, H.S. Chen, L. Cheng, H.Y. Chou, E. Choumilov, V. Choutko, C.H. Chung, C. Clark, R. Clavero, G. Coignet, C. Consolandi, A. Contin, C. Corti, E. Cortina Gil, B. Coste, W. Creus, M. Crispoltoni, Z. Cui, Y.M. Dai, C. Delgado, S. Della Torre, M.B. Demirköz, L. Derome, S. Di Falco, L. Di Masso, F. Dimiccoli, C. Díaz, P. von Doetinchem, F. Donnini, W.J. Du, M. Duranti, D. D’Urso, A. Eline, F.J. Eppling, T. Eronen, Y.Y. Fan, L. Farnesini, J. Feng, E. Fiandrini, A. Fiasson, E. Finch, P. Fisher, Y. Galaktionov, G. Gallucci, B. García, R. García-López, C. Gargiulo, H. Gast, I. Gebauer, M. Gervasi, A. Ghelfi, W. Gillard, F. Giovacchini, P. Goglov, J. Gong, C. Goy, V. Grabski, D. Grandi, M. Graziani, C. Guandalini, I. Guerri, K.H. Guo, D. Haas, M. Habiby, S. Haino, K.C. Han, Z.H. He, M. Heil, J. Hoffman, T.H. Hsieh, Z.C. Huang, C. Huh, M. Incagli, M. Ionica, W.Y. Jang, H. Jinchi, K. Kanishev, G.N. Kim, K.S. Kim, Th. Kirn, R. Kossakowski, 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, G. Levi, H.L. Li, J.Q. Li, Q. Li, Q. Li, T.X. Li, W. Li, Y. Li, Z.H. Li, Z.Y. Li, S. Lim, C.H. Lin, P. Lipari, T. Lippert, D. Liu, H. Liu, M. Lolli, T. Lomtadze, M.J. Lu, S.Q. Lu, Y.S. Lu, K. Luebelsmeyer, 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, M. Müller, J.Q. Ni, N. Nikonov, F. Nozzoli, P. Nunes, A. Obermeier, A. Oliva, M. Orcinha, F. Palmonari, C. Palomares, M. Paniccia, A. Papi, M. Pauluzzi, E. Pedreschi, S. Pensotti, R. Pereira, N. Picot-Clemente, F. Pilo, A. Piluso, C. Pizzolotto, V. Plyaskin, M. Pohl, V. Poireau, E. Postaci, A. Putze, L. Quadrani, X.M. Qi, X. Qin, Z.Y. Qu, T. Räihä, P.G. Rancoita, D. Rapin, J.S. Ricol, I. Rodríguez, S. Rosier-Lees, A. Rozhkov, D. Rozza, R. Sagdeev, J. Sandweiss, P. Saouter, C. Sbarra, S. Schael, S.M. Schmidt, A. Schulz von Dratzig, G. Schwering, G. Scolieri, E.S. Seo, B.S. Shan, Y.H. Shan, J.Y. Shi, X.Y. Shi, Y.M. Shi, T. Siedenburg, D. Son, F. Spada, F. Spinella, W. Sun, W.H. Sun, M. Tacconi, C.P. Tang, X.W. Tang, Z.C. Tang, L. Tao, D. Tescaro, Samuel C.C. Ting, S.M. Ting, N. Tomassetti, J. Torsti, C. Türkolu, T. Urban, V. Vagelli, E. Valente, C. Vannini, E. Valtonen, S. Vaurynovich, M. Vecchi, M. Velasco, J.P. Vialle, V. Vitale, S. Vitillo, L.Q. Wang, N.H. Wang, Q.L. Wang, R.S. Wang, X. Wang, Z.X. Wang, Z.L. Weng, K. Whitman, J. Wienkenhöver, H. Wu, X. Wu, X. Xia, M. Xie, 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.H. Zhang, M.T. Zhang, X.B. Zhang, Z. Zhang, Z.M. Zheng, H.L. Zhuang, V. Zhukov, A. Zichichi, N. Zimmermann, P. Zuccon, C. Zurbach

PublisherAmer Physical Soc

Publication year2015

JournalPhysical Review Letters

Journal name in sourcePHYSICAL REVIEW LETTERS

Journal acronymPhys Rev Lett

Article number171103

Volume114

Issue17

Number of pages9

ISSN0031-9007

DOIhttps://doi.org/10.1103/PhysRevLett.114.171103


Abstract

A precise measurement of the proton flux in primary cosmic rays with rigidity (momentum/charge) from 1 GV to 1.8 TV is presented based on 300 million events. Knowledge of the rigidity dependence of the proton flux is important in understanding the origin, acceleration, and propagation of cosmic rays. We present the detailed variation with rigidity of the flux spectral index for the first time. The spectral index progressively hardens at high rigidities.



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