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http://hdl.handle.net/20.500.12386/29833
Title: | Cosmic ray proton plus helium energy spectrum measured by the ARGO-YBJ experiment in the energy range 3-300 TeV | Authors: | Bartoli, B. Bernardini, P. Bi, X. J. Cao, Z. Catalanotti, S. Chen, S. Z. Chen, T. L. Cui, S. W. Dai, B. Z. D'Amone, A. Danzengluobu, De Mitri, I. D'Ettorre Piazzoli, B. Di Girolamo, T. Di Sciascio, G. Feng, C. F. Feng, Zhaoyang Feng, Zhenyong Gou, Q. B. Guo, Y. Q. He, H. H. Hu, Haibing Hu, Hongbo Iacovacci, M. Iuppa, R. Jia, H. Y. Labaciren, Li, H. J. Liu, C. Liu, J. Liu, M. Y. Lu, H. Ma, L. L. Ma, X. H. Mancarella, G. Mari, S. M. Marsella, G. Mastroianni, S. Montini, P. Ning, C. C. Perrone, L. Pistilli, P. Salvini, P. Santonico, R. Settanta, G. Shen, P. R. Sheng, X. D. Shi, F. Surdo, A. Tan, Y. H. VALLANIA, PIERO VERNETTO, Silvia Teresa Vigorito, C. Wang, H. Wu, C. Y. Wu, H. R. Xue, L. Yang, Q. Y. Yang, X. C. Yao, Z. G. Yuan, A. F. Zha, M. Zhang, H. M. Zhang, L. Zhang, X. Y. Zhang, Y. Zhao, J. Zhaxiciren, Zhaxisangzhu, Zhou, X. X. Zhu, F. R. Zhu, Q. Q. ARGO-YBJ Collaboration |
Issue Date: | 2015 | Journal: | PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY | Number: | 91 | Issue: | 11 | First Page: | 112017 | Abstract: | The ARGO-YBJ experiment is a full-coverage air shower detector located at the Yangbajing Cosmic Ray Observatory (Tibet, People's Republic of China, 4300 m a.s.l.). The high altitude, combined with the full-coverage technique, allows the detection of extensive air showers in a wide energy range and offer the possibility of measuring the cosmic ray proton plus helium spectrum down to the TeV region, where direct balloon/space-borne measurements are available. The detector has been in stable data taking in its full configuration from November 2007 to February 2013. In this paper the measurement of the cosmic ray proton plus helium energy spectrum is presented in the region 3-300 TeV by analyzing the full collected data sample. The resulting spectral index is γ =-2.64 ±0.01 , the error is dominated by systematic uncertainties. The accurate measurement of the spectrum of light elements with a ground based air shower detector demonstrates the possibility of extending these measurements at larger energies, where galactic cosmic ray sources should run out of power in accelerating light elements. | Acknowledgments: | ACKNOWLEDGMENTS This work is supported in China by NSFC (Contract No. 101201307940), the Chinese Ministry of Science and Technology, the Chinese Academy of Science, the Key Laboratory of Particle Astrophysics, CAS, and in Italy by the Istituto Nazionale di Fisica Nucleare (INFN), and Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR). We also acknowledge the essential support of W. Y. Chen, G. Yang, X. F. Yuan, C. Y. Zhao, R. Assiro, B. Biondo, S. Bricola, F. Budano, A. Corvaglia, B. D’Aquino, R. Esposito, A. Innocente, A. Mangano, E. Pastori, C. Pinto, E. Reali, F. Taurino, and A. Zerbini, in the installation, debugging, and maintenance of the detector. | URI: | http://hdl.handle.net/20.500.12386/29833 | URL: | https://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.112017 | ISSN: | 1550-7998 | DOI: | 10.1103/PhysRevD.91.112017 | Bibcode ADS: | 2015PhRvD..91k2017B | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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postprint_argo_pHe_1503.07136.pdf | postprint | 745.79 kB | Adobe PDF | View/Open |
2015_PhysRevD.91.112017_pHe_spe_ARGO.pdf | Pdf editoriale | 435.15 kB | Adobe PDF | View/Open |
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