Measurements of All-Particle Energy Spectrum and Mean Logarithmic Mass of Cosmic Rays from 0.3 to 30 PeV with LHAASO-KM2A

被引：3
|
作者：
Cao, Zhen [1 ,2 ,3 ,4 ,5 ]
Aharonian, F. [6 ,7 ]
Axikegu [8 ,9 ]
Bai, Y. X. [1 ,2 ,3 ,5 ]
Bao, Y. W. [10 ]
Bastieri, D. [11 ]
Bi, X. J. [1 ,2 ,3 ,4 ,5 ]
Bi, Y. J. [1 ,2 ,3 ,5 ]
Bian, W. [12 ,13 ]
Bukevich, A. V. [14 ]
Cao, Q. [15 ]
Cao, W. Y. [16 ]
Cao, Zhe [16 ,17 ]
Chang, J. [18 ,19 ]
Chang, J. F. [1 ,2 ,3 ,5 ,17 ]
Chen, A. M. [12 ,13 ]
Chen, E. S. [1 ,2 ,3 ,4 ,5 ]
Chen, H. X. [20 ]
Chen, Liang [21 ]
Chen, Lin [8 ,9 ]
Chen, Long [8 ,9 ]
Chen, M. J. [1 ,2 ,3 ,5 ]
Chen, M. L. [1 ,2 ,3 ,5 ,17 ]
Chen, Q. H. [8 ,9 ]
Chen, S. [22 ]
Chen, S. H. [1 ,2 ,3 ,4 ,5 ]
Chen, S. Z. [1 ,2 ,3 ,5 ]
Chen, T. L. [23 ]
Chen, Y. [10 ]
Cheng, N. [1 ,2 ,3 ,5 ]
Cheng, Y. D. [1 ,2 ,3 ,4 ,5 ]
Cui, M. Y. [18 ,19 ]
Cui, S. W. [15 ]
Cui, X. H. [24 ]
Cui, Y. D. [25 ,26 ,27 ]
Dai, B. Z. [22 ]
Dai, H. L. [1 ,2 ,3 ,5 ,17 ]
Dai, Z. G. [16 ]
Danzengluobu [24 ]
Dong, X. Q. [1 ,2 ,3 ,4 ,5 ]
Duan, K. K. [18 ,19 ]
Fan, J. H. [11 ]
Fan, Y. Z. [18 ,19 ]
Fang, J. [22 ]
Fang, J. H. [20 ]
Fang, K. [1 ,2 ,3 ,5 ]
Feng, C. F. [28 ]
Feng, H. [1 ,2 ,3 ]
Feng, L. [18 ,19 ]
Feng, S. H. [17 ]
机构：
[1] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China
[2] Chinese Acad Sci, Inst High Energy Phys, Expt Phys Div, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Comp Ctr, Beijing 100049, Peoples R China
[4] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[5] Tianfu Cosm Ray Res Ctr, Chengdu 610000, Sichuan, Peoples R China
[6] Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland
[7] Max Planck Inst Nucl Phys, POB 103980, D-69029 Heidelberg, Germany
[8] Southwest Jiaotong Univ, Sch Phys Sci & Technol, Chengdu 610031, Sichuan, Peoples R China
[9] Southwest Jiaotong Univ, Sch Informat Sci & Technol, Chengdu 610031, Sichuan, Peoples R China
[10] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Jiangsu, Peoples R China
[11] Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China
[12] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China
[13] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
[14] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia
[15] Hebei Normal Univ, Shijiazhuang 050024, Hebei, Peoples R China
[16] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
[17] State Key Lab Particle Detect & Elect, Beijing, Peoples R China
[18] Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210023, Jiangsu, Peoples R China
[19] Chinese Acad Sci, Key Lab Radio Astron, Purple Mt Observ, Nanjing 210023, Jiangsu, Peoples R China
[20] Zhejiang Lab, Res Ctr Astron Comp, Hangzhou 311121, Zhejiang, Peoples R China
[21] Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
[22] Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China
[23] Tibet Univ, Minist Educ, Key Lab Cosm Rays, Lhasa 850000, Tibet, Peoples R China
[24] Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
[25] Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519000, Peoples R China
[26] Sun Yat Sen Univ, Sch Phys, Guangzhou 510275, Guangdong, Peoples R China
[27] Sun Yat Sen Univ, Sinofrench Inst Nucl Engn & Technol, Zhuhai 519000, Peoples R China
[28] Shandong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Shandong, Peoples R China
[29] Univ Paris Cite, APC, CEA IRFU, Observ Paris,CNRS IN2P3, F-75205 Paris, France
[30] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
[31] Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Henan, Peoples R China
[32] Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China
[33] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China
[34] Sichuan Univ, Coll Phys, Chengdu 610065, Sichuan, Peoples R China
[35] Peking Univ, Sch Phys, Beijing 100871, Peoples R China
[36] Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Guangxi, Peoples R China
[37] Mahidol Univ, Dept Phys, Fac Sci, Bangkok 10400, Thailand
[38] Moscow Inst Phys & Technol, Moscow 141700, Russia
[39] Nanchang Univ, Sch Phys & Mat Sci, Ctr Relativist Astrophys & High Energy Phys, Nanchang 330031, Jiangxi, Peoples R China
[40] Nanchang Univ, Inst Space Sci & Technol, Nanchang 330031, Jiangxi, Peoples R China
[41] Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China
[42] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 13期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
TIBET; KNEE;
D O I：
10.1103/PhysRevLett.132.131002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present the measurements of all -particle energy spectrum and mean logarithmic mass of cosmic rays in the energy range of 0.3-30 PeV using data collected from LHAASO-KM2A between September 2021 and December 2022, which is based on a nearly composition -independent energy reconstruction method, achieving unprecedented accuracy. Our analysis reveals the position of the knee at 3.67 +/- 0.05 +/- 0.15 PeV. Below the knee, the spectral index is found to be -2.7413 +/- 0.0004 +/- 0.0050, while above the knee, it is -3.128 +/- 0.005 +/- 0.027, with the sharpness of the transition measured with a statistical error of 2%. The mean logarithmic mass of cosmic rays is almost heavier than helium in the whole measured energy range. It decreases from 1.7 at 0.3 PeV to 1.3 at 3 PeV, representing a 24% decline following a power law with an index of -0.1200 +/- 0.0003 +/- 0.0341. This is equivalent to an increase in abundance of light components. Above the knee, the mean logarithmic mass exhibits a power law trend towards heavier components, which is reversal to the behavior observed in the all -particle energy spectrum. Additionally, the knee position and the change in power -law index are approximately the same. These findings suggest that the knee observed in the all -particle spectrum corresponds to the knee of the light component, rather than the medium -heavy components.
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页数：8
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共 10 条
  • [1] The all-particle energy spectrum of cosmic rays from 10 TeV to 1 PeV measured with HAWC
    Morales-Soto, J.A.
    Arteaga-Velázquez, J.C.
    [J]. arXiv, 2022,
  • [2] Approaches to composition independent energy reconstruction of cosmic rays based on the LHAASO-KM2A detector
    Zhang, Hengying
    He, Huihai
    Feng, Cunfeng
    [J]. PHYSICAL REVIEW D, 2022, 106 (12)
  • [3] 'Fine structure' in the energy spectrum, and changes in the mass composition, of cosmic rays in the energy range 0.3-10 PeV
    Erlykin, AD
    Wolfendale, AW
    [J]. ASTRONOMY & ASTROPHYSICS, 1999, 350 (01) : L1 - L4
  • [4] All-particle cosmic ray energy spectrum measured by the HAWC experiment from 10 to 500 TeV
    Alfaro, R.
    Alvarez, C.
    Alvarez, J. D.
    Arceo, R.
    Arteaga-Velazquez, J. C.
    Avila Rojas, D.
    Solares, H. A. Ayala
    Barber, A. S.
    Becerril, A.
    Belmont-Moreno, E.
    BenZvi, S. Y.
    Brisbois, C.
    Caballero-Mora, K. S.
    Capistran, T.
    Carraminana, A.
    Casanova, S.
    Castillo, M.
    Cotti, U.
    Cotzomi, J.
    Coutino de Leon, S.
    De Leon, C.
    De la Fuente, E.
    Diaz Hernandez, R.
    Dichiara, S.
    Dingus, B. L.
    DuVernois, M. A.
    Diaz-Velez, J. C.
    Ellsworth, R. W.
    Enriquez-Rivera, O.
    Fiorino, D. W.
    Fleischhack, H.
    Fraija, N.
    Garcia-Gonzalez, J. A.
    Gonzalez Munoz, A.
    Gonzalez, M. M.
    Goodman, J. A.
    Hampel-Arias, Z.
    Harding, J. P.
    Hernandez-Almada, A.
    Hinton, J.
    Hueyotl-Zahuantitla, F.
    Hui, C. M.
    Huntemeyer, P.
    Iriarte, A.
    Jardin-Blicq, A.
    Joshi, V.
    Kaufmann, S.
    Lara, A.
    Lauer, R. J.
    Lennarz, D.
    [J]. PHYSICAL REVIEW D, 2017, 96 (12)
  • [5] Measurement of Ultra-High-Energy Diffuse Gamma-Ray Emission of the Galactic Plane from 10 TeV to 1 PeV with LHAASO-KM2A
    Cao, Zhen
    Aharonian, F.
    An, Q.
    Axikegu
    Bai, Y. X.
    Bao, Y. W.
    Bastieri, D.
    Bi, X. J.
    Bi, Y. J.
    Cai, J. T.
    Cao, Q.
    Cao, W. Y.
    Cao, Zhe
    Chang, J.
    Chang, J. F.
    Chen, A. M.
    Chen, E. S.
    Chen, Liang
    Chen, Lin
    Chen, Long
    Chen, M. J.
    Chen, M. L.
    Chen, Q. H.
    Chen, S. H.
    Chen, S. Z.
    Chen, T. L.
    Chen, Y.
    Cheng, N.
    Cheng, Y. D.
    Cui, M. Y.
    Cui, S. W.
    Cui, X. H.
    Cui, Y. D.
    Dai, B. Z.
    Dai, H. L.
    Dai, Z. G.
    Danzengluobu
    della Volpe, D.
    Dong, X. Q.
    Duan, K. K.
    Fan, J. H.
    Fan, Y. Z.
    Fang, J.
    Fang, K.
    Feng, C. F.
    Feng, L.
    Feng, S. H.
    Feng, X. T.
    Feng, Y. L.
    Gabici, S.
    [J]. PHYSICAL REVIEW LETTERS, 2023, 131 (15)
  • [6] The energy spectrum of all-particle cosmic rays around the knee region observed with the Tibet-III air-shower array
    Amenomori, M.
    Ayabe, S.
    Bi, X. J.
    Chen, D.
    Cui, S. W.
    Danzengluobu
    Ding, L. K.
    Ding, X. H.
    Feng, C. F.
    Feng, Zhaoyang
    Feng, Z. Y.
    Gao, X. Y.
    Geng, Q. X.
    Guo, H. W.
    He, H. H.
    He, M.
    Hibino, K.
    Hotta, N.
    Hu, Haibing
    Hu, H. B.
    Huang, J.
    Huang, Q.
    Jia, H. Y.
    Kajino, F.
    Kasahara, K.
    Katayose, Y.
    Kato, C.
    Kawata, K.
    Labaciren
    Le, G. M.
    Li, A. F.
    Li, J. Y.
    Lou, Y. -Q.
    Lu, H.
    Lu, S. L.
    Meng, X. R.
    Mizutani, K.
    Mu, J.
    Munakata, K.
    Nagai, A.
    Nanjo, H.
    Nishizawa, M.
    Ohnishi, M.
    Ohta, I.
    Onuma, H.
    Ouchi, T.
    Ozawa, S.
    Ren, J. R.
    Saito, T.
    Saito, T. Y.
    [J]. ADVANCES IN SPACE RESEARCH, 2008, 42 (03) : 467 - 472
  • [7] On the mean logarithmic mass of cosmic rays derived from measurements of the average depth of the maximum of extensive air showers
    Hörandel, JR
    [J]. NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2006, 151 : 75 - 78
  • [8] Power-law partition and entropy production of high-energy cosmic rays: Knee-ankle structure of the all-particle spectrum
    Tomaschitz, Roman
    [J]. EPL, 2013, 104 (01)
  • [9] Energy spectrum and chemical composition of cosmic rays between 0.3 and 10 PeV determined from the Cherenkov-light and charged-particle distributions in air showers
    Arqueros, F
    Barrio, JA
    Bernlöhr, K
    Bojahr, H
    Calle, I
    Contreras, JL
    Cortina, J
    Deckers, T
    Denninghoff, S
    Fonseca, V
    Gebauer, J
    González, JC
    Haustein, V
    Heinzelmann, G
    Hohl, H
    Horns, D
    Ibarra, A
    Kestel, M
    Kirstein, O
    Kornmayer, H
    Kranich, D
    Krawczynski, H
    Lindner, A
    Lorenz, E
    Magnussen, N
    Meyer, H
    Mirzoyan, R
    Moralejo, A
    Padilla, L
    Petry, D
    Plaga, R
    Prahl, J
    Rauterberg, G
    Rhode, W
    Röhring, A
    Samorski, M
    Schmele, D
    Schröder, F
    Stamm, W
    Wiebel-Sooth, B
    Willmer, M
    Wittek, W
    [J]. ASTRONOMY & ASTROPHYSICS, 2000, 359 (02): : 682 - 694
  • [10] The all-particle spectrum of primary cosmic rays in the wide energy range from 1014 to 1017 eV observed with the Tibet-III air-shower array
    Amenomori, M.
    Bi, X. J.
    Chen, D.
    Cui, S. W.
    Danzengluobu
    Ding, L. K.
    Ding, X. H.
    Fan, C.
    Feng, C. F.
    Feng, Zhaoyang
    Feng, Z. Y.
    Gao, X. Y.
    Geng, Q. X.
    Guo, H. W.
    He, H. H.
    He, M.
    Hibino, K.
    Hotta, N.
    Hu, Haibing
    Hu, H. B.
    Huang, J.
    Huang, Q.
    Jia, H. Y.
    Kajino, F.
    Kasahara, K.
    Katayose, Y.
    Kato, C.
    Kawata, K.
    Labaciren
    Le, G. M.
    Li, A. F.
    Li, J. Y.
    Lou, Y. -Q.
    Lu, H.
    Lu, S. L.
    Meng, X. R.
    Mizutani, K.
    Mu, J.
    Munakata, K.
    Nagai, A.
    Nanjo, H.
    Nishizawa, M.
    Ohnishi, M.
    Ohta, I.
    Onuma, H.
    Ouchi, T.
    Ozawa, S.
    Ren, J. R.
    Saito, T.
    Saito, T. Y.
    [J]. ASTROPHYSICAL JOURNAL, 2008, 678 (02): : 1165 - 1179
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