First Identification and Precise Spectral Measurement of the Proton Component in the Cosmic-Ray `Knee'
First Identification and Precise Spectral Measurement of the Proton Component in the Cosmic-Ray `Knee'
We report the first high-purity identification of cosmic-ray (CR) protons and a precise measurement of their energy spectrum from 0.15 to 12 PeV using the Large High Altitude Air Shower Observatory (LHAASO). Abundant event statistics, combined with the simultaneous detection of electrons/photons, muons, and Cherenkov light in air showers, enable spectroscopic measurements with statistical and systematic accuracy comparable to satellite data at lower energies. The proton spectrum shows significant hardening relative to low-energy extrapolations, culminating at 3 PeV, followed by sharp softening. This distinct spectral structure - closely aligned with the knee in the all-particle spectrum - points to the emergence of a new CR component at PeV energies, likely linked to the dozens of PeVatrons recently discovered by LHAASO, and offers crucial clues to the origin of Galactic cosmic rays.
K. Li、L. Li、R. L. Li、S. D. Li、T. Y. Li、W. L. Li、X. R. Li、Xin Li、Y. Li、Y. Z. Li、Zhe Li、Zhuo Li、E. W. Liang、Y. F. Liang、S. J. Lin、P. Lipari、B. Liu、C. Liu、D. Liu、D. B. Liu、H. Liu、H. D. Liu、J. Liu、J. L. Liu、J. R. Liu、M. Y. Liu、R. Y. Liu、S. M. Liu、W. Liu、X. Liu、Y. Liu、Y. Liu、Y. N. Liu、Y. Q. Lou、Q. Luo、Y. Luo、H. K. Lv、B. Q. Ma、L. L. Ma、X. H. Ma、J. R. Mao、Z. Min、W. Mitthumsiri、G. B. Mou、H. J. Mu、A. Neronov、K. C. Y. Ng、M. Y. Ni、L. Nie、L. J. Ou、J. C. Qi、P. Pattarakijwanich、Z. Y. Pei、M. Y. Qi、F. W. Shu、H. C. Song、P. H. T. Tam、J. J. Qin、A. Raza、C. Y. Ren、D. Ruffolo、D. Semikoz、L. Shao、O. Shchegolev、Y. Z. Shen、X. D. Sheng、Z. D. Shi、A. Saiz、V. Stepanov、Y. Su、D. X. Sun、H. Sun、Q. N. Sun、X. N. Sun、Z. B. Sun、N. H. Tabasam、J. Takata、H. B. Tan、Q. W. Tang、R. Tang、Z. B. Tang、W. W. Tian、C. N. Tong、L. H. Wan、C. Wang、G. W. Wang、H. G. Wang、J. C. Wang、K. Wang、L. Y. Wang、R. Wang、W. Wang、X. G. Wang、Q. W. Wu、S. Wu、Y. S. Wu、Kai Wang、Kai Wang、L. P. Wang、L. Y. Wang、X. J. Wang、X. Y. Wang、Y. Wang、Y. D. Wang、Z. H. Wang、Z. X. Wang、Zheng Wang、D. M. Wei、J. J. Wei、Y. J. Wei、T. Wen、S. S. Weng、C. Y. Wu、H. R. Wu、X. F. Wu、S. Q. Xi、J. Xia、J. J. Xia、G. M. Xiang、D. X. Xiao、G. Xiao、Y. L. Xin、Y. Xing、D. R. Xiong、Z. Xiong、D. L. Xu、R. F. Xu、R. X. Xu、W. L. Xu、L. L. Yang、M. J. Yang、R. Z. Yang、W. X. Yang、Z. H. Yang、Z. G. Yao、X. A. Ye、L. Xue、D. H. Yan、T. Yan、C. W. Yang、C. Y. Yang、Z. Y. You、Q. Yuan、H. Yue、H. D. Zeng、T. X. Zeng、W. Zeng、X. T. Zeng、M. Zha、F. F. Yang、Y. J. Bi、W. Bian、A. V. Bukevich、C. M. Cai、W. Y. Cao、Zhe Cao、J. Chang、J. F. Chang、A. M. Chen、E. S. Chen、G. H. Chen、H. X. Chen、Liang Chen、Long Chen、M. J. Chen、M. L. Chen、Q. H. Chen、S. Chen、S. H. Chen、S. Z. Chen、T. L. Chen、O. A. Hannuksela、M. Hasan、H. H. He、H. N. He、J. Y. He、X. Y. He、Y. He、S. Hernandez-Cadena、B. W. Hou、C. Hou、X. Hou、H. B. Hu、S. C. Hu、C. Huang、D. H. Huang、J. J. Huang、T. Q. Huang、W. J. Huang、X. T. Huang、X. Y. Huang、Y. Huang、Y. Y. Huang、X. L. Ji、H. Y. Jia、K. Jia、H. B. Jiang、K. Jiang、X. W. Jiang、Z. J. Jiang、M. Jin、S. Kaci、M. M. Kang、I. Karpikov、D. Khangulyan、D. Kuleshov、K. Kurinov、B. B. Li、Cheng Li、Cong Li、D. Li、F. Li、H. B. Li、H. C. Li、Jian Li、Jie Li、L. Q. Yin、N. Yin、X. H. You、B. B. Zhang、B. T. Zhang、C. Zhang、F. Zhang、H. Zhang、H. M. Zhang、H. Y. Zhang、J. L. Zhang、Li Zhang、P. F. Zhang、P. P. Zhang、R. Zhang、S. R. Zhang、S. S. Zhang、W. Y. Zhang、X. Zhang、X. P. Zhang、Yi Zhang、Yong Zhang、Z. P. Zhang、J. Zhao、L. Zhao、L. Z. Zhao、S. P. Zhao、X. H. Zhao、Z. H. Zhao、F. Zheng、W. J. Zhong、B. Zhou、H. Zhou、J. N. Zhou、M. Zhou、P. Zhou、R. Zhou、X. X. Zhou、X. X. Zhou、B. Y. Zhu、C. G. Zhu、F. R. Zhu、H. Zhu、K. J. Zhu、Y. C. Zou、X. Zuo、X. B. Chen、X. J. Chen、Y. Chen、N. Cheng、Y. D. Cheng、M. C. Chu、M. Y. Cui、S. W. Cui、X. H. Cui、Y. D. Cui、B. Z. Dai、H. L. Dai、Z. G. Dai、Danzengluobu、Y. X. Diao、X. Q. Dong、K. K. Duan、J. H. Fan、Y. Z. Fan、J. Fang、J. H. Fang、K. Fang、C. F. Feng、H. Feng、L. Feng、S. H. Feng、X. T. Feng、Y. Feng、Y. L. Feng、S. Gabici、B. Gao、C. D. Gao、Q. Gao、W. Gao、W. K. Gao、M. M. Ge、T. T. Ge、L. S. Geng、G. Giacinti、G. H. Gong、Q. B. Gou、M. H. Gu、F. L. Guo、J. Guo、X. L. Guo、Y. Q. Guo、Y. Y. Guo、Y. A. Han、The LHAASO Collaboration、Zhen Cao、F. Aharonian、Y. X. Bai、Y. W. Bao、D. Bastieri、X. J. Bi
天文学
K. Li,L. Li,R. L. Li,S. D. Li,T. Y. Li,W. L. Li,X. R. Li,Xin Li,Y. Li,Y. Z. Li,Zhe Li,Zhuo Li,E. W. Liang,Y. F. Liang,S. J. Lin,P. Lipari,B. Liu,C. Liu,D. Liu,D. B. Liu,H. Liu,H. D. Liu,J. Liu,J. L. Liu,J. R. Liu,M. Y. Liu,R. Y. Liu,S. M. Liu,W. Liu,X. Liu,Y. Liu,Y. Liu,Y. N. Liu,Y. Q. Lou,Q. Luo,Y. Luo,H. K. Lv,B. Q. Ma,L. L. Ma,X. H. Ma,J. R. Mao,Z. Min,W. Mitthumsiri,G. B. Mou,H. J. Mu,A. Neronov,K. C. Y. Ng,M. Y. Ni,L. Nie,L. J. Ou,J. C. Qi,P. Pattarakijwanich,Z. Y. Pei,M. Y. Qi,F. W. Shu,H. C. Song,P. H. T. Tam,J. J. Qin,A. Raza,C. Y. Ren,D. Ruffolo,D. Semikoz,L. Shao,O. Shchegolev,Y. Z. Shen,X. D. Sheng,Z. D. Shi,A. Saiz,V. Stepanov,Y. Su,D. X. Sun,H. Sun,Q. N. Sun,X. N. Sun,Z. B. Sun,N. H. Tabasam,J. Takata,H. B. Tan,Q. W. Tang,R. Tang,Z. B. Tang,W. W. Tian,C. N. Tong,L. H. Wan,C. Wang,G. W. Wang,H. G. Wang,J. C. Wang,K. Wang,L. Y. Wang,R. Wang,W. Wang,X. G. Wang,Q. W. Wu,S. Wu,Y. S. Wu,Kai Wang,Kai Wang,L. P. Wang,L. Y. Wang,X. J. Wang,X. Y. Wang,Y. Wang,Y. D. Wang,Z. H. Wang,Z. X. Wang,Zheng Wang,D. M. Wei,J. J. Wei,Y. J. Wei,T. Wen,S. S. Weng,C. Y. Wu,H. R. Wu,X. F. Wu,S. Q. Xi,J. Xia,J. J. Xia,G. M. Xiang,D. X. Xiao,G. Xiao,Y. L. Xin,Y. Xing,D. R. Xiong,Z. Xiong,D. L. Xu,R. F. Xu,R. X. Xu,W. L. Xu,L. L. Yang,M. J. Yang,R. Z. Yang,W. X. Yang,Z. H. Yang,Z. G. Yao,X. A. Ye,L. Xue,D. H. Yan,T. Yan,C. W. Yang,C. Y. Yang,Z. Y. You,Q. Yuan,H. Yue,H. D. Zeng,T. X. Zeng,W. Zeng,X. T. Zeng,M. Zha,F. F. Yang,Y. J. Bi,W. Bian,A. V. Bukevich,C. M. Cai,W. Y. Cao,Zhe Cao,J. Chang,J. F. Chang,A. M. Chen,E. S. Chen,G. H. Chen,H. X. Chen,Liang Chen,Long Chen,M. J. Chen,M. L. Chen,Q. H. Chen,S. Chen,S. H. Chen,S. Z. Chen,T. L. Chen,O. A. Hannuksela,M. Hasan,H. H. He,H. N. He,J. Y. He,X. Y. He,Y. He,S. Hernandez-Cadena,B. W. Hou,C. Hou,X. Hou,H. B. Hu,S. C. Hu,C. Huang,D. H. Huang,J. J. Huang,T. Q. Huang,W. J. Huang,X. T. Huang,X. Y. Huang,Y. Huang,Y. Y. Huang,X. L. Ji,H. Y. Jia,K. Jia,H. B. Jiang,K. Jiang,X. W. Jiang,Z. J. Jiang,M. Jin,S. Kaci,M. M. Kang,I. Karpikov,D. Khangulyan,D. Kuleshov,K. Kurinov,B. B. Li,Cheng Li,Cong Li,D. Li,F. Li,H. B. Li,H. C. Li,Jian Li,Jie Li,L. Q. Yin,N. Yin,X. H. You,B. B. Zhang,B. T. Zhang,C. Zhang,F. Zhang,H. Zhang,H. M. Zhang,H. Y. Zhang,J. L. Zhang,Li Zhang,P. F. Zhang,P. P. Zhang,R. Zhang,S. R. Zhang,S. S. Zhang,W. Y. Zhang,X. Zhang,X. P. Zhang,Yi Zhang,Yong Zhang,Z. P. Zhang,J. Zhao,L. Zhao,L. Z. Zhao,S. P. Zhao,X. H. Zhao,Z. H. Zhao,F. Zheng,W. J. Zhong,B. Zhou,H. Zhou,J. N. Zhou,M. Zhou,P. Zhou,R. Zhou,X. X. Zhou,X. X. Zhou,B. Y. Zhu,C. G. Zhu,F. R. Zhu,H. Zhu,K. J. Zhu,Y. C. Zou,X. Zuo,X. B. Chen,X. J. Chen,Y. Chen,N. Cheng,Y. D. Cheng,M. C. Chu,M. Y. Cui,S. W. Cui,X. H. Cui,Y. D. Cui,B. Z. Dai,H. L. Dai,Z. G. Dai,Danzengluobu,Y. X. Diao,X. Q. Dong,K. K. Duan,J. H. Fan,Y. Z. Fan,J. Fang,J. H. Fang,K. Fang,C. F. Feng,H. Feng,L. Feng,S. H. Feng,X. T. Feng,Y. Feng,Y. L. Feng,S. Gabici,B. Gao,C. D. Gao,Q. Gao,W. Gao,W. K. Gao,M. M. Ge,T. T. Ge,L. S. Geng,G. Giacinti,G. H. Gong,Q. B. Gou,M. H. Gu,F. L. Guo,J. Guo,X. L. Guo,Y. Q. Guo,Y. Y. Guo,Y. A. Han,The LHAASO Collaboration,Zhen Cao,F. Aharonian,Y. X. Bai,Y. W. Bao,D. Bastieri,X. J. Bi.First Identification and Precise Spectral Measurement of the Proton Component in the Cosmic-Ray `Knee'[EB/OL].(2025-05-20)[2025-06-23].https://arxiv.org/abs/2505.14447.点此复制
评论