/ physics.ins-det arXiv:1708.01265


Seasonal Variation of the Underground Cosmic Muon Flux Observed at Daya Bay


An, F.P. (East China U. Sci. Tech., Shanghai) ; Balantekin, A.B. (U. Wisconsin, Madison (main)) ; Band, H.R. (Yale U.) ; Bishai, M. (Brookhaven Natl. Lab.) ; Blyth, S. (Natl. United U., Taiwan) ; Cao, D. (Nanjing U.) ; Cao, G.F. (Beijing, Inst. High Energy Phys.) ; Cao, J. (Beijing, Inst. High Energy Phys.) ; Chan, Y.L. (Hong Kong, Chinese U.) ; Chang, J.F. (Beijing, Inst. High Energy Phys.) ; Chang, Y. (Natl. United U., Taiwan) ; Chen, H.S. (Beijing, Inst. High Energy Phys.) ; Chen, Q.Y. (Shandong U.) ; Chen, S.M. (Tsinghua U., Beijing) ; Chen, Y.X. (North China Electric Power U., Beijing) ; Chen, Y. (Shenzhen U.) ; Cheng, J. (Shandong U.) ; Cheng, Z.K. (Zhongshan U.) ; Cherwinka, J.J. (U. Wisconsin, Madison (main)) ; Chu, M.C. (Hong Kong, Chinese U.) ; Chukanov, A. (Dubna, JINR) ; Cummings, J.P. (Siena Coll., Loudonville) ; Ding, Y.Y. (Beijing, Inst. High Energy Phys.) ; Diwan, M.V. (Brookhaven Natl. Lab.) ; Dolgareva, M. (Dubna, JINR) ; Dove, J. (Illinois U., Urbana (main)) ; Dwyer, D.A. (LBL, Berkeley) ; Edwards, W.R. (LBL, Berkeley) ; Gill, R. (Brookhaven Natl. Lab.) ; Gonchar, M. (Dubna, JINR) ; Gong, G.H. (Tsinghua U., Beijing) ; Gong, H. (Tsinghua U., Beijing) ; Grassi, M. (Beijing, Inst. High Energy Phys.) ; Gu, W.Q. (Shanghai Jiaotong U.) ; Guo, L. (Tsinghua U., Beijing) ; Guo, X.H. (Beijing Normal U.) ; Guo, Y.H. (Xian Jiaotong U.) ; Guo, Z. (Tsinghua U., Beijing) ; Hackenburg, R.W. (Brookhaven Natl. Lab.) ; Hans, S. (Brookhaven Natl. Lab.) ; He, M. (Beijing, Inst. High Energy Phys.) ; Heeger, K.M. (Yale U.) ; Heng, Y.K. (Beijing, Inst. High Energy Phys.) ; Higuera, A. (Houston U.) ; Hsiung, Y.B. (Taiwan, Natl. Taiwan U.) ; Hu, B.Z. (Taiwan, Natl. Taiwan U.) ; Hu, T. (Beijing, Inst. High Energy Phys.) ; Huang, E.C. (Illinois U., Urbana (main)) ; Huang, H.X. (Beijing, Inst. Atomic Energy) ; Huang, X.T. (Shandong U.) ; Huber, P. (Virginia Tech.) ; Huo, W. (Hefei, CUST) ; Hussain, G. (Tsinghua U., Beijing) ; Jaffe, D.E. (Brookhaven Natl. Lab.) ; Jen, K.L. (Taiwan, Natl. Chiao Tung U.) ; Jetter, S. (Beijing, Inst. High Energy Phys.) ; Ji, X.P. (Tsinghua U., Beijing) ; Ji, X.L. (Beijing, Inst. High Energy Phys.) ; Jiao, J.B. (Shandong U.) ; Johnson, R.A. (Cincinnati U.) ; Jones, D. (Temple U.) ; Kang, L. (DongGuan U. Technol.) ; Kettell, S.H. (Brookhaven Natl. Lab.) ; Khan, A. (Zhongshan U.) ; Kohn, S. (UC, Berkeley) ; Kramer, M. (UC, Berkeley) ; Kwan, K.K. (Hong Kong, Chinese U.) ; Kwok, M.W. (Hong Kong, Chinese U.) ; Kwok, T. (Hong Kong U.) ; Langford, T.J. (Yale U.) ; Lau, K. (Houston U.) ; Lebanowski, L. (Tsinghua U., Beijing) ; Lee, J. (LBL, Berkeley) ; Lee, J.H.C. (Hong Kong U.) ; Lei, R.T. (DongGuan U. Technol.) ; Leitner, R. (Charles U.) ; Li, C. (Shandong U.) ; Li, D.J. (Hefei, CUST) ; Li, F. (Beijing, Inst. High Energy Phys.) ; Li, G.S. (Shanghai Jiaotong U.) ; Li, Q.J. (Beijing, Inst. High Energy Phys.) ; Li, S. (DongGuan U. Technol.) ; Li, S.C. (Virginia Tech.) ; Li, W.D. (Beijing, Inst. High Energy Phys.) ; Li, X.N. (Beijing, Inst. High Energy Phys.) ; Li, X.Q. (Nankai U.) ; Li, Y.F. (Beijing, Inst. High Energy Phys.) ; Li, Z.B. (Zhongshan U.) ; Liang, H. (Hefei, CUST) ; Lin, C.J. (LBL, Berkeley) ; Lin, G.L. (Taiwan, Natl. Chiao Tung U.) ; Lin, S. (DongGuan U. Technol.) ; Lin, S.K. (Houston U.) ; Lin, Y.-C. (Taiwan, Natl. Taiwan U.) ; Ling, J.J. (Zhongshan U.) ; Link, J.M. (Virginia Tech.) ; Littenberg, L. (Brookhaven Natl. Lab.) ; Littlejohn, B.R. (IIT, Chicago) ; Liu, J.L. (Shanghai Jiaotong U.) ; Liu, J.C. (Beijing, Inst. High Energy Phys.) ; Loh, C.W. (Nanjing U.) ; Lu, C. (Princeton U.) ; Lu, H.Q. (Beijing, Inst. High Energy Phys.) ; Lu, J.S. (Beijing, Inst. High Energy Phys.) ; Luk, K.B. (LBL, Berkeley) ; Ma, X.Y. (Beijing, Inst. High Energy Phys.) ; Ma, X.B. (North China Electric Power U., Beijing) ; Ma, Y.Q. (Beijing, Inst. High Energy Phys.) ; Malyshkin, Y. (Chile U., Catolica) ; Martinez Caicedo, D.A. (IIT, Chicago) ; McDonald, K.T. (Princeton U.) ; McKeown, R.D. (William-Mary Coll.) ; Mitchell, I. (Houston U.) ; Nakajima, Y. (LBL, Berkeley) ; Napolitano, J. (Temple U.) ; Naumov, D. (Dubna, JINR) ; Naumova, E. (Dubna, JINR) ; Ngai, H.Y. (Hong Kong U.) ; Ochoa-Ricoux, J.P. (Chile U., Catolica) ; Olshevskiy, A. (Dubna, JINR) ; Pan, H.-R. (Taiwan, Natl. Taiwan U.) ; Park, J. (Virginia Tech.) ; Patton, S. (LBL, Berkeley) ; Pec, V. (Charles U.) ; Peng, J.C. (Illinois U., Urbana (main)) ; Pinsky, L. (Houston U.) ; Pun, C.S.J. (Hong Kong U.) ; Qi, F.Z. (Beijing, Inst. High Energy Phys.) ; Qi, M. (Nanjing U.) ; Qian, X. (Brookhaven Natl. Lab.) ; Qiu, R.M. (North China Electric Power U., Beijing) ; Raper, N. (Zhongshan U.) ; Ren, J. (Beijing, Inst. Atomic Energy) ; Rosero, R. (Brookhaven Natl. Lab.) ; Roskovec, B. (Charles U.) ; Ruan, X.C. (Beijing, Inst. Atomic Energy) ; Sebastiani, C. (Beijing, Inst. High Energy Phys.) ; Steiner, H. (LBL, Berkeley) ; Sun, J.L. (CGNPC, Shenzhen) ; Tang, W. (Brookhaven Natl. Lab.) ; Taychenachev, D. (Dubna, JINR) ; Treskov, K. (Dubna, JINR) ; Tsang, K.V. (LBL, Berkeley) ; Tull, C.E. (LBL, Berkeley) ; Viaux, N. (Chile U., Catolica) ; Viren, B. (Brookhaven Natl. Lab.) ; Vorobel, V. (Charles U.) ; Wang, C.H. (Natl. United U., Taiwan) ; Wang, M. (Shandong U.) ; Wang, N.Y. (Beijing Normal U.) ; Wang, R.G. (Beijing, Inst. High Energy Phys.) ; Wang, W. (Zhongshan U.) ; Wang, X. (Natl. U. Defense Tech., Hunan) ; Wang, Y.F. (Beijing, Inst. High Energy Phys.) ; Wang, Z. (Tsinghua U., Beijing) ; Wang, Z. (Beijing, Inst. High Energy Phys.) ; Wang, Z.M. (Beijing, Inst. High Energy Phys.) ; Wei, H.Y. (Tsinghua U., Beijing) ; Wen, L.J. (Beijing, Inst. High Energy Phys.) ; Whisnant, K. (Iowa State U.) ; White, C.G. (IIT, Chicago) ; Whitehead, L. (Houston U.) ; Wong, H.L.H. (LBL, Berkeley) ; Wong, S.C.F. (Zhongshan U.) ; Worcester, E. (Brookhaven Natl. Lab.) ; Wu, C.-H. (Taiwan, Natl. Chiao Tung U.) ; Wu, Q. (Shandong U.) ; Wu, W.J. (Beijing, Inst. High Energy Phys.) ; Xia, D.M. (Chongqing U.) ; Xia, J.K. (Beijing, Inst. High Energy Phys.) ; Xing, Z.Z. (Beijing, Inst. High Energy Phys.) ; Xu, J.L. (Beijing, Inst. High Energy Phys.) ; Xu, Y. (Zhongshan U.) ; Xue, T. (Tsinghua U., Beijing) ; Yang, C.G. (Beijing, Inst. High Energy Phys.) ; Yang, H. (Nanjing U.) ; Yang, L. (DongGuan U. Technol.) ; Yang, M.S. (Beijing, Inst. High Energy Phys.) ; Yang, M.T. (Shandong U.) ; Ye, M. (Beijing, Inst. High Energy Phys.) ; Ye, Z. (Houston U.) ; Yeh, M. (Brookhaven Natl. Lab.) ; Young, B.L. (Iowa State U.) ; Yu, Z.Y. (Beijing, Inst. High Energy Phys.) ; Zeng, S. (Beijing, Inst. High Energy Phys.) ; Zhan, L. (Beijing, Inst. High Energy Phys.) ; Zhang, C. (Brookhaven Natl. Lab.) ; Zhang, C.C. (Beijing, Inst. High Energy Phys.) ; Zhang, H.H. (Zhongshan U.) ; Zhang, J.W. (Beijing, Inst. High Energy Phys.) ; Zhang, Q.M. (Xian Jiaotong U.) ; Zhang, X.T. (Beijing, Inst. High Energy Phys.) ; Zhang, Y.M. (Tsinghua U., Beijing) ; Zhang, Y.X. (CGNPC, Shenzhen) ; Zhang, Y.M. (Zhongshan U.) ; Zhang, Z.J. (DongGuan U. Technol.) ; Zhang, Z.Y. (Beijing, Inst. High Energy Phys.) ; Zhang, Z.P. (Hefei, CUST) ; Zhao, J. (Beijing, Inst. High Energy Phys.) ; Zhou, L. (Beijing, Inst. High Energy Phys.) ; Zhuang, H.L. (Beijing, Inst. High Energy Phys.) ; Zou, J.H. (Beijing, Inst. High Energy Phys.)

Abstract: The Daya Bay Experiment consists of eight identically designed detectors located in three underground experimental halls named as EH1, EH2, EH3, with 250, 265 and 860 meters of water equivalent vertical overburden, respectively. Cosmic muon events have been recorded over a two-year period. The underground muon rate is observed to be positively correlated with the effective atmospheric temperature and to follow a seasonal modulation pattern. The correlation coefficient $\alpha$, describing how a variation in the muon rate relates to a variation in the effective atmospheric temperature, is found to be $\alpha_{\text{EH1}} = 0.362\pm0.031$, $\alpha_{\text{EH2}} = 0.433\pm0.038$ and $\alpha_{\text{EH3}} = 0.641\pm0.057$ for each experimental hall.

Web-Page: http://inspirehep.net/record/1614475/files/pdf_temperature_ecmwf_dyb.png; http://inspirehep.net/record/1614475/files/pdf_threshold_energy.png; http://inspirehep.net/record/1614475/files/pdf_overburden_v11.png; http://inspirehep.net/record/1614475/files/pdf_muon_survival_prob.png; http://inspirehep.net/record/1614475/files/pdf_corr_hbased_cleanrate_eh2_ad2_tot.png; http://inspirehep.net/record/1614475/files/pdf_corr_hbased_cleanrate_eh1_ad1_tot.png; http://inspirehep.net/record/1614475/files/pdf_corr_hbased_cleanrate_eh1_ad2_tot.png; http://inspirehep.net/record/1614475/files/pdf_corr_hbased_cleanrate_eh2_ad1_tot.png; http://inspirehep.net/record/1614475/files/pdf_merged_eh2.png; http://inspirehep.net/record/1614475/files/pdf_merged_eh1.png; http://inspirehep.net/record/1614475/files/pdf_corr_hbased_cleanrate_eh3_ad4_tot.png; http://inspirehep.net/record/1614475/files/pdf_corr_hbased_cleanrate_eh3_ad3_tot.png; http://inspirehep.net/record/1614475/files/pdf_corr_hbased_cleanrate_eh3_ad2_tot.png; http://inspirehep.net/record/1614475/files/pdf_corr_hbased_cleanrate_eh3_ad1_tot.png; http://inspirehep.net/record/1614475/files/pdf_michel__comparison_adPool_adMuon_EH1_AD1.png; http://inspirehep.net/record/1614475/files/pdf_data_prediction_comparison.png; http://inspirehep.net/record/1614475/files/pdf_radius_distro_vs_energyCut_EH1_AD1.png; http://inspirehep.net/record/1614475/files/pdf_radius_distro_vs_energyCut_EH3_AD1.png; http://inspirehep.net/record/1614475/files/pdf_average_ecmwf_dyb_temp_with_weights_canvas.png; http://inspirehep.net/record/1614475/files/pdf_merged_eh3.png; http://inspirehep.net/record/1614475/files/pdf_fitted_muon_rate.png; http://inspirehep.net/record/1614475/files/arXiv:1708.01265.pdf


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