用余弦100检测器测量宇宙MUON年度和昼夜通量变化

论文标题

用余弦100检测器测量宇宙MUON年度和昼夜通量变化

Measurement of the cosmic muon annual and diurnal flux variation with the COSINE-100 detector

论文作者

100 Collaboration, Prihtiadi, H., Adhikari, G., de Souza, E. Barbosa, Carlin, N., Choi, J. J., Choi, S., Djamal, M., Ezeribe, A. C., França, L. E., Ha, C., Hahn, I. S., Jeon, E. J., Jo, J. H., Kang, W. G., Kauer, M., Kim, H., Kim, H. J., Kim, K. W., Kim, S. K., Kim, Y. D., Kim, Y. H., Ko, Y. J., Lee, E. K., Lee, H. S., Lee, J., Lee, J. Y., Lee, M. H., Lee, S. H., Leonard, D. S., Manzato, B. B., Maruyama, R. H., Neal, R. J., Olsen, S. L., Park, B. J., Park, H. K., Park, H. S., Park, K. S., Pitta, R. L. C., Ra, S. J., Rott, C., Shin, K. A., Scraff, A., Spooner, N. J. C., Thompson, W. G., Yang, L., Yu, G. H.

论文摘要

我们报告了在2016年9月至2019年7月之间获得的952天余弦100数据的宇宙 - 射线宇宙速率（Y2L）中宇宙射线元率（Y2L）的年度和昼夜调制的测量。确定了大气温度的相关性。有效的大气温度和若子率变化与测量的有效温度系数为$α_{t} $ = 0.80 $ \ pm $ 0.11呈正相关。该结果与大气中的介子产量模型一致。我们还通过比较一个小时的间隔来搜索地下若子率的昼夜调制。未观察到若恩速率的显着昼夜调制。

We report measurements of annual and diurnal modulations of the cosmic-ray muon rate in the Yangyang underground laboratory (Y2L) using 952 days of COSINE-100 data acquired between September 2016 and July 2019. A correlation of the muon rate with the atmospheric temperature is observed and its amplitude on the muon rate is determined. The effective atmospheric temperature and muon rate variations are positively correlated with a measured effective temperature coefficient of $α_{T}$ = 0.80 $\pm$ 0.11. This result is consistent with a model of meson production in the atmosphere. We also searched for a diurnal modulation in the underground muon rate by comparing one-hour intervals. No significant diurnal modulation of the muon rate was observed.

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