Light-component spectrum of the primary cosmic rays in the multi-TeV region measured by the ARGO-YBJ experiment

B Bartoli,Z Cao,G Liguori,S Mastroianni,P R Shen,A K Calabrese Melcarne,M Panareo,C Liu,X Y Zhang,G Mancarella,C F Feng,M Zha,S W Cui,X C Yang,Y Zhang,G Zizzi,Zhaxisangzhu Zhaxisangzhu,A Surdo,C C Ning,Danzengluobu Danzengluobu,M Dattoli,F Ruggieri,S Vernetto,G Di Sciascio,Labaciren Labaciren,P Salvini,B D’Ettorre Piazzoli,S Catalanotti,H Wang,X X Li,X B Qu,Zhaxiciren Zhaxiciren,A Budano,Y H Tan,P Camarri,M Iacovacci,P Pistilli,D Martello,M Y Liu,Q Y Yang,S Z Chen,Haibing Hu,H Y Jia,J Y Li,G Marsella,L Perrone,Hongbo Hu,R Santonico,P Bernardini,P Branchini,F R Zhu,X J Bi,P Zhang,T L Chen,E Giroletti,Q B Gou,C Y Wu,A Pagliaro,Y Chen,Q Q Zhu,B Panico,I James,Z G Yao,X D Sheng,P Creti,C Q Liu,R Cardarelli,I Bolognino,T Di Girolamo,L Zhang,X X Zhou,A F Yuan,H J Li,L Xue,J Liu,H M Zhang,Jianli Zhang,P Vallania,C Bleve,Jilong Zhang,H R Wu,Y Q Guo,B Wang,I De Mitri,Q Huang,C Vigorito,R Iuppa,X H Ding,H H He,P Montini,B Z Dai,Benda Xu ,Xiaojun Yan ,H Lü ,Feng Shi ,Claudio Cattaneo ,C Stănescu ,X H ,G D’alí Staiti ,Z Feng ,Z Y Feng ,Stefano Maria Mari

doi:10.1103/physrevd.85.092005

Abstract

The ARGO-YBJ experiment detects extensive air showers in a wide energy range by means of a full-coverage detector which is in stable data taking in its full configuration since November 2007 at the YBJ International Cosmic Ray Observatory (4300 m a.s.l., Tibet, People’s Republic of China). In this paper the measurement of the light-component spectrum of primary cosmic rays in the energy region (5÷200) TeV is reported. The method exploited to analyze the experimental data is based on a Bayesian procedure. The measured intensities of the light component are consistent with the recent CREAM results and higher than that obtained adding the proton and helium spectra reported by the RUNJOB experiment.Received 7 November 2011DOI:https://doi.org/10.1103/PhysRevD.85.092005© 2012 American Physical Society

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