Accès ouvert déclaré
2024
preprint
First measurement of the yield of $^8$He isotopes produced in liquid scintillator by cosmic-ray muons at Daya Bay
Daya Bay collaboration, Fengpeng An, A. B. Balantekin, M. Bishai, S. Blyth, G. F. Cao, Jun Cao, J. F. Chang, Y. Chang, Hui Chen, H. Y. Chen, Shao-Long Chen, Ye Chen, Y. X. Chen, Z. Y. Chen, Jie Cheng, Yin Cheong Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. Chu, J. P. Cummings, Olivia Dalager, F. S. Deng, X. Y. Ding, Y. Y. Ding, M. V. Diwan, T. Dohnal, Dmitry Dolzhikov, J. Dove, Katherine Dugas, Hongyue Duyang, D. A. Dwyer, J. P. Gallo, M. Gonchar, G. H. Gong, Haipeng Gong, W. Gu, J. Y. Guo, L. Guo, X. H. Guo, Yingjun Guo, Z. J. Guo, R. Hackenburg, Y. Han, S. Hans, M. He, K. M. Heeger, Y. K. Heng, Y. K. Hor, Y. Hsiung, Beibei Hu, Z. Hu, J. F. Hu, H. X. Huang, Jihong Huang, X. T. Huang, Y. B. Huang, Patrick Huber, D. E. Jaffe, K. L. Jen, X. L. Ji, X. Ji, R. A. Johnson, D. Jones, L. Kang, S. H. Kettell, S. Kohn, M. Krämer, T. J. Langford, J. Lee, J. H. C. Lee, R. T. Lei, R. Leitner, J. K. C. Leung, Li Fei, H. L. Li, J. J. Li, Q. J. Li, R. H. Li, S. Li, S. Li, W. D. Li, X. N. Li, Xuejing Li, Yufeng Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, J. C. Liu, J. L. Liu, J. X. Liu, C. Lü, H. Q. Lu, K. B. Luk, B. Z. Ma, X. B. Ma, X. Y. Ma, Y. Q. Ma, R. C. Mandujano, C. Marshall, K. T. McDonald, R. D. McKeown, Yanfeng Meng, J. Napolitano, D. Naumov, E. Naumova, T. M. T. Nguyen, J. P. Ochoa‐Ricoux, A. Olshevskiy, J. Park, S. Patton, J. C. Peng, C. S. J. Pun, F. Z. Qi, M. Qi, X. Qian, N. Raper, J. R. Ren, C. Morales Reveco, R. Rosero, B. Roskovec, X. C. Ruan, B. Russell, H. Steiner, Jian Sun, T. Tmej, W. -H. Tse, C. E. Tull, Y. C. Tung, B. Viren, V. Vorobel, C. Wang, Jincheng Wang, Meng Wang, N. Y. Wang, Ruiguang Wang, Wei Wang, X. Wang, Y. F. Wang, Z. Wang, Z. M. Wang, H. Wei, L. H. Wei, L. J. Wen, K. Whisnant, C. G. White, H. L. H. Wong, E. Worcester, Diru Wu, Q. Wu, W. Wu, D. M. Xia, Z. Q. Xie, Z. Z. Xing, Huaiyu Xu, Jilei Xu, T. Xu, T. Xue, C. G. Yang, Lei Yang, Y. Z. Yang, Hang Yao, M. Ye, M. Yeh, B. L. Young, H. Z. Yu, Zeyuan Yu, B. B. Yue, Vitalii Zavadskyi, S. Zeng, Yuda Zeng, Liang Zhan, C. Zhang, F. Y. Zhang, H. H. Zhang, J. L. Zhang, J. W. Zhang, Q. M. Zhang, S. Q. Zhang, X. T. Zhang, Y. M. Zhang, Y. X. Zhang, Y. Y. Zhang, Z. J. Zhang, Z. P. Zhang, Z. Y. Zhang, Jiayi Zhao, R. Z. Zhao, L. Zhou, H. L. Zhuang, J. H. Zou
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Le résumé fourni par la source
Daya Bay presents the first measurement of cosmogenic $^8$He isotope production in liquid scintillator, using an innovative method for identifying cascade decays of $^8$He and its child isotope, $^8$Li. We also measure the production yield of $^9$Li isotopes using well-established methodology. The results, in units of 10$^{-8}μ^{-1}$g$^{-1}$cm$^{2}$, are 0.307$\pm$0.042, 0.341$\pm$0.040, and 0.546$\pm$0.076 for $^8$He, and 6.73$\pm$0.73, 6.75$\pm$0.70, and 13.74$\pm$0.82 for $^9$Li at average muon energies of 63.9~GeV, 64.7~GeV, and 143.0~GeV, respectively. The measured production rate of $^8$He isotopes is more than an order of magnitude lower than any other measurement of cosmogenic isotope production. It replaces the results of previous attempts to determine the ratio of $^8$He to $^9$Li production that yielded a wide range of limits from 0 to 30\%. The results provide future liquid-scintillator-based experiments with improved ability to predict cosmogenic backgrounds.
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Les sujets associés
Particle physics theoretical and experimental studiesAtomic and Subatomic Physics ResearchDark Matter and Cosmic Phenomena