【作者单位】1 Dipartimento di Fisica dell’Universitá di Napoli “Federico II,” Complesso Universitario di Monte Sant’Angelo, via Cinthia, I-80126 Napoli, Italy 2 Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Complesso Universitario di Monte Sant’Angelo, via Cinthia, I-80126 Napoli, Italy 3 Dipartimento Matematica e Fisica “Ennio De Giorgi,” Universitá del Salento, via per Arnesano, I-73100 Lecce, Italy 4 Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, via per Arnesano, I-73100 Lecce, Italy 5 Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918, 100049 Beijing, People’s Republic of China 6 School of Physical Sciences, University of Chinese Academy of Sciences, 100049 Beijing, People’s Republic of China 7 Tibet University, 850000 Lhasa, Xizang, People’s Republic of China 8 Hebei Normal University, 050024 Shijiazhuang Hebei, People’s Republic of China 9 Yunnan University, 2 North Cuihu Road, 650091 Kunming, Yunnan, People’s Republic of China 10 Gran Sasso Science Institute (GSSI), Via M. Iacobucci 2, I-67100 L’Aquila, Italy 11 Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, via della Ricerca Scientifica 1, I-00133 Roma, Italy 12 Shandong University, 250100 Jinan, Shandong, People’s Republic of China 13 Southwest Jiaotong University, 610031 Chengdu, Sichuan, People’s Republic of China
【摘要】 This paper reports on the observation of the sidereal large-scale anisotropy of cosmic rays using data collected by the ARGO-YBJ experiment over 5 years (2008–2012). This analysis extends previous work limited to the period from 2008 January to 2009 ...