Constraints on the cosmic-ray electron spectrum above 25 TeV from the LHAASO experiment
文献类型：期刊论文
| 作者 | Cao, Zhen33,34,35; Aharonian, F.1,32; Axikegu31; Bai, Y. X.33,35; Bao, Y. W.30; Bastieri, D.2; Bi, X. J.33,34,35; Bi, Y. J.33,35; Bian, W.29; Bian, W.29 |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2025-07-31 |
| 卷号 | 112期号:2 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/wy2f-b9p3 |
| 产权排序 | 第26完成单位 |
| 文献子类 | Article |
| 英文摘要 | Cosmic-ray electrons and positrons (CREs) offer valuable insights into the origins of local cosmic rays, as they rapidly cool in interstellar magnetic and radiation fields, limiting their propagation range. The CRE spectrum reveals a spectral break around 1 TeV, followed by a continuous power-law behavior that possibly extends beyond 40 TeV. Deviations from a pure power-law in this spectrum could provide important clues about the local origins of CREs. However, due to the rapidly falling flux of CRE, the ratio of hadron/CRE increases with energy, making the rejection more and more challenging. Equipped with a large detection aperture and strong background rejection capability, LHAASO has the potential to extend CRE spectrum measurements beyond 25 TeV, which is almost the highest energy measured by existing experiments. In this work, we study the detector performance and explore the optimized background rejection of cosmic nuclei background specifically for CRE observations in LHAASO. Our analysis reveals that muon-poor nuclei showers have a strong dependence on the hadronic model when estimating the cosmic nuclei background and rejection capability. Consequently, we derived a 90% CL upper limit for the CRE spectrum from 25 to 160 TeV, providing a new and restrictive constraint in the hundreds of TeV range for the first time. |
| 学科主题 | 物理学 ; 天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
| URL标识 | 查看原文 |
| 出版地 | ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA |
| WOS关键词 | HIGH-ENERGY ; POSITRONS ; PULSARS |
| 资助项目 | National Science Foundation of China, NSFC[12205314]; Natural Science Foundation of SiChuan Province of China[2024NSFSC1372]; Youth Innovation Promotion Association CAS[2022010]; National Science and Technology Development Agency (NSTDA); National Research Council of Thailand (NRCT): High-Potential Research Team Grant Program[N42A650868] |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001545453700001 |
| 出版者 | AMER PHYSICAL SOC |
| 资助机构 | National Science Foundation of China, NSFC[12205314] ; Natural Science Foundation of SiChuan Province of China[2024NSFSC1372] ; Youth Innovation Promotion Association CAS[2022010] ; National Science and Technology Development Agency (NSTDA) ; National Research Council of Thailand (NRCT): High-Potential Research Team Grant Program[N42A650868] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28673]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 通讯作者 | Hasan, M.; Wu, C. Y.; Xin, Y. L. |
| 作者单位 | 1.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, 69029 Heidelberg, Germany; 2.Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China; 3.School of Physics, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China 4.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, China; 5.Center for Relativistic Astrophysics and High Energy Physics, School of Physics and Materials Science and Institute of Space Science and Technology, Nanchang University, 330031 Nanchang, Jiangxi, China; 6.Moscow Institute of Physics and Technology, 141700 Moscow, Russia; 7.Department of Physics, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; 8.Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, China; 9.School of Physics, Peking University, 100871 Beijing, China; 10.College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China; |
| 推荐引用方式 GB/T 7714 | Cao, Zhen,Aharonian, F.,Axikegu,et al. Constraints on the cosmic-ray electron spectrum above 25 TeV from the LHAASO experiment[J]. PHYSICAL REVIEW D,2025,112(2). |
| APA | Cao, Zhen.,Aharonian, F..,Axikegu.,Bai, Y. X..,Bao, Y. W..,...&Zuo, X..(2025).Constraints on the cosmic-ray electron spectrum above 25 TeV from the LHAASO experiment.PHYSICAL REVIEW D,112(2). |
| MLA | Cao, Zhen,et al."Constraints on the cosmic-ray electron spectrum above 25 TeV from the LHAASO experiment".PHYSICAL REVIEW D 112.2(2025). |
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来源：云南天文台
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