| Study on the separation of 100 TeV γ-rays from cosmic rays for the Tibet ASγ experiment |
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| 引用本文： | 冯朝阳,张毅,刘成,樊超,李红超,王博,吴含荣,胡红波,卢红,谭有恒.Study on the separation of 100 TeV γ-rays from cosmic rays for the Tibet ASγ experiment[J].中国物理 C,2011,35(2):153-157. |
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| 作者姓名： | 冯朝阳 张毅 刘成 樊超 李红超 王博 吴含荣 胡红波 卢红 谭有恒 |
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| 作者单位： | 1. Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;;2. Department of Physics, Shandong University, Jinan 250100, China;;3. Department of Physics, Hebei Normal University, Shijiazhuang 050016, China |
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| 基金项目： | ＊ Supported by Chinese Academy of Sciences，External Cooperation Program of Chinese Academy of Sciences，National Natural Science Foundation of China (10725524 |
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| 摘 要： | A γ/hadron separation analysis is described for the observed air shower events with primary energy above 100 TeV based on the Tibet ASγ detector configuration. The shower age and size parameters are fitted from the measured lateral density distribution and used as discrimination variables. According to the MC simulation while taking into account the systematic uncertainty estimated from data and MC comparison, it is found that 70% of the cosmic ray (CR) background can be rejected while more than 78% of the γ-rays can be retained. Sensitivity for 100 TeV γ-rays observation can thus be improved by at least 40%.
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| 关 键 词： | 宇宙射线 分离分析 TeV 西藏 实验 一次能源 密度分布 不确定性 |
| 收稿时间： | 2010-3-1 |
| 修稿时间： | 2010-7-13 |
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