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  1. Article ; Online: Measurements of All-Particle Energy Spectrum and Mean Logarithmic Mass of Cosmic Rays from 0.3 to 30 PeV with LHAASO-KM2A.

    Cao, Zhen / Aharonian, F / Axikegu / Bai, Y X / Bao, Y W / Bastieri, D / Bi, X J / Bi, Y J / Bian, W / Bukevich, A V / Cao, Q / Cao, W Y / Cao, Zhe / Chang, J / Chang, J F / Chen, A M / Chen, E S / Chen, H X / Chen, Liang /
    Chen, Lin / Chen, Long / Chen, M J / Chen, M L / Chen, Q H / Chen, S / 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 / Dong, X Q / Duan, K K / Fan, J H / Fan, Y Z / Fang, J / Fang, J H / Fang, K / Feng, C F / Feng, H / Feng, L / Feng, S H / Feng, X T / Feng, Y / Feng, Y L / Gabici, S / Gao, B / Gao, C D / Gao, Q / Gao, W / Gao, W K / Ge, M M / Geng, L S / Giacinti, G / Gong, G H / Gou, Q B / Gu, M H / Guo, F L / Guo, X L / Guo, Y Q / Guo, Y Y / Han, Y A / Hasan, M / He, H H / He, H N / He, J Y / He, Y / Hor, Y K / Hou, B W / Hou, C / Hou, X / Hu, H B / Hu, Q / Hu, S C / Huang, D H / Huang, T Q / Huang, W J / Huang, X T / Huang, X Y / Huang, Y / Ji, X L / Jia, H Y / Jia, K / Jiang, K / Jiang, X W / Jiang, Z J / Jin, M / Kang, M M / Karpikov, I / Kuleshov, D / Kurinov, K / Li, B B / Li, C M / Li, Cheng / Li, Cong / Li, D / Li, F / Li, H B / Li, H C / Li, Jian / Li, Jie / Li, K / Li, S D / Li, W L / Li, X R / Li, Xin / Li, Y Z / Li, Zhe / Li, Zhuo / Liang, E W / Liang, Y F / Lin, S J / Liu, B / Liu, C / Liu, D / Liu, D B / Liu, H / Liu, H D / Liu, J / Liu, J L / Liu, M Y / Liu, R Y / Liu, S M / Liu, W / Liu, Y / Liu, Y N / Luo, Q / Luo, Y / Lv, H K / Ma, B Q / Ma, L L / Ma, X H / Mao, J R / Min, Z / Mitthumsiri, W / Mu, H J / Nan, Y C / Neronov, A / Ou, L J / Pattarakijwanich, P / Pei, Z Y / Qi, J C / Qi, M Y / Qiao, B Q / Qin, J J / Raza, A / Ruffolo, D / Sáiz, A / Saeed, M / Semikoz, D / Shao, L / Shchegolev, O / Sheng, X D / Shu, F W / Song, H C / Stenkin, Yu V / Stepanov, V / Su, Y / Sun, D X / Sun, Q N / Sun, X N / Sun, Z B / Takata, J / Tam, P H T / Tang, Q W / Tang, R / Tang, Z B / Tian, W W / Wang, C / Wang, C B / Wang, G W / Wang, H G / Wang, H H / Wang, J C / Wang, Kai / Wang, L P / Wang, L Y / Wang, P H / Wang, R / Wang, W / Wang, X G / Wang, X Y / Wang, Y / Wang, Y D / Wang, Y J / Wang, Z H / Wang, Z X / Wang, Zhen / Wang, Zheng / Wei, D M / Wei, J J / Wei, Y J / Wen, T / Wu, C Y / Wu, H R / Wu, Q W / Wu, S / Wu, X F / Wu, Y S / Xi, S Q / Xia, J / Xiang, G M / Xiao, D X / Xiao, G / Xin, Y L / Xing, Y / Xiong, D R / Xiong, Z / Xu, D L / Xu, R F / Xu, R X / Xu, W L / Xue, L / Yan, D H / Yan, J Z / Yan, T / Yang, C W / Yang, C Y / Yang, F / Yang, F F / Yang, L L / Yang, M J / Yang, R Z / Yang, W X / Yao, Y H / Yao, Z G / Yin, L Q / Yin, N / You, X H / You, Z Y / Yu, Y H / Yuan, Q / Yue, H / Zeng, H D / Zeng, T X / Zeng, W / Zha, M / Zhang, B B / 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 B / Zhang, S R / Zhang, S S / Zhang, X / Zhang, X P / Zhang, Y F / Zhang, Yi / Zhang, Yong / Zhao, B / Zhao, J / Zhao, L / Zhao, L Z / Zhao, S P / Zhao, X H / Zheng, F / Zhong, W J / Zhou, B / Zhou, H / Zhou, J N / Zhou, M / Zhou, P / Zhou, R / Zhou, X X / Zhu, B Y / Zhu, C G / Zhu, F R / Zhu, H / Zhu, K J / Zou, Y C / Zuo, X

    Physical review letters

    2024  Volume 132, Issue 13, Page(s) 131002

    Abstract: 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- ... ...

    Abstract 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.
    Language English
    Publishing date 2024-04-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.132.131002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: 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 / Gao, B / Gao, C D / Gao, L Q / Gao, Q / Gao, W / Gao, W K / Ge, M M / Geng, L S / Giacinti, G / Gong, G H / Gou, Q B / Gu, M H / Guo, F L / Guo, X L / Guo, Y Q / Guo, Y Y / Han, Y A / He, H H / He, H N / He, J Y / He, X B / He, Y / Heller, M / Hor, Y K / Hou, B W / Hou, C / Hou, X / Hu, H B / Hu, Q / Hu, S C / Huang, D H / Huang, T Q / Huang, W J / Huang, X T / Huang, X Y / Huang, Y / Huang, Z C / Ji, X L / Jia, H Y / Jia, K / Jiang, K / Jiang, X W / Jiang, Z J / Jin, M / Kang, M M / Ke, T / Kuleshov, D / Kurinov, K / Li, B B / Li, Cheng / Li, Cong / Li, D / Li, F / Li, H B / Li, H C / Li, H Y / Li, J / Li, Jian / Li, Jie / Li, K / Li, W L / Li, X R / Li, Xin / Li, Y Z / Li, Zhe / Li, Zhuo / Liang, E W / Liang, Y F / Lin, S J / Liu, B / Liu, C / Liu, D / Liu, H / Liu, H D / Liu, J / Liu, J L / Liu, J Y / Liu, M Y / Liu, R Y / Liu, S M / Liu, W / Liu, Y / Liu, Y N / Lu, R / Luo, Q / Lv, H K / Ma, B Q / Ma, L L / Ma, X H / Mao, J R / Min, Z / Mitthumsiri, W / Mu, H J / Nan, Y C / Neronov, A / Ou, Z W / Pang, B Y / Pattarakijwanich, P / Pei, Z Y / Qi, M Y / Qi, Y Q / Qiao, B Q / Qin, J J / Ruffolo, D / Sáiz, A / Semikoz, D / Shao, C Y / Shao, L / Shchegolev, O / Sheng, X D / Shu, F W / Song, H C / Stenkin, Yu V / Stepanov, V / Su, Y / Sun, Q N / Sun, X N / Sun, Z B / Tam, P H T / Tang, Q W / Tang, Z B / Tian, W W / Wang, C / Wang, C B / Wang, G W / Wang, H G / Wang, H H / Wang, J C / Wang, K / Wang, L P / Wang, L Y / Wang, P H / Wang, R / Wang, W / Wang, X G / Wang, X Y / Wang, Y / Wang, Y D / Wang, Y J / Wang, Z H / Wang, Z X / Wang, Zhen / Wang, Zheng / Wei, D M / Wei, J J / Wei, Y J / Wen, T / Wu, C Y / Wu, H R / Wu, S / Wu, X F / Wu, Y S / Xi, S Q / Xia, J / Xia, J J / Xiang, G M / Xiao, D X / Xiao, G / Xin, G G / Xin, Y L / Xing, Y / Xiong, Z / Xu, D L / Xu, R F / Xu, R X / Xu, W L / Xue, L / Yan, D H / Yan, J Z / Yan, T / Yang, C W / Yang, F / Yang, F F / Yang, H W / Yang, J Y / Yang, L L / Yang, M J / Yang, R Z / Yang, S B / Yao, Y H / Yao, Z G / Ye, Y M / Yin, L Q / Yin, N / You, X H / You, Z Y / Yu, Y H / Yuan, Q / Yue, H / Zeng, H D / Zeng, T X / Zeng, W / Zha, M / Zhang, B B / Zhang, F / Zhang, H M / Zhang, H Y / Zhang, J L / Zhang, L X / Zhang, Li / Zhang, P F / Zhang, P P / Zhang, R / Zhang, S B / Zhang, S R / Zhang, S S / Zhang, X / Zhang, X P / Zhang, Y F / Zhang, Yi / Zhang, Yong / Zhao, B / Zhao, J / Zhao, L / Zhao, L Z / Zhao, S P / Zheng, F / Zhou, B / Zhou, H / Zhou, J N / Zhou, M / Zhou, P / Zhou, R / Zhou, X X / Zhu, C G / Zhu, F R / Zhu, H / Zhu, K J / Zuo, X

    Physical review letters

    2023  Volume 131, Issue 15, Page(s) 151001

    Abstract: The diffuse Galactic γ-ray emission, mainly produced via interactions between cosmic rays and the interstellar medium and/or radiation field, is a very important probe of the distribution, propagation, and interaction of cosmic rays in the Milky Way. In ... ...

    Abstract The diffuse Galactic γ-ray emission, mainly produced via interactions between cosmic rays and the interstellar medium and/or radiation field, is a very important probe of the distribution, propagation, and interaction of cosmic rays in the Milky Way. In this Letter, we report the measurements of diffuse γ rays from the Galactic plane between 10 TeV and 1 PeV energies, with the square kilometer array of the Large High Altitude Air Shower Observatory (LHAASO). Diffuse emissions from the inner (15°<l<125°, |b|<5°) and outer (125°<l<235°, |b|<5°) Galactic plane are detected with 29.1σ and 12.7σ significance, respectively. The outer Galactic plane diffuse emission is detected for the first time in the very- to ultra-high-energy domain (E>10  TeV). The energy spectrum in the inner Galaxy regions can be described by a power-law function with an index of -2.99±0.04, which is different from the curved spectrum as expected from hadronic interactions between locally measured cosmic rays and the line-of-sight integrated gas content. Furthermore, the measured flux is higher by a factor of ∼3 than the prediction. A similar spectrum with an index of -2.99±0.07 is found in the outer Galaxy region, and the absolute flux for 10≲E≲60  TeV is again higher than the prediction for hadronic cosmic ray interactions. The latitude distributions of the diffuse emission are consistent with the gas distribution, while the longitude distributions show clear deviation from the gas distribution. The LHAASO measurements imply that either additional emission sources exist or cosmic ray intensities have spatial variations.
    Language English
    Publishing date 2023-10-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.131.151001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A tera-electron volt afterglow from a narrow jet in an extremely bright gamma-ray burst.

    Cao, Zhen / Aharonian, F / An, Q / Axikegu / Bai, L X / 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, 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, H L / Cheng, N / Cheng, Y D / 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 / Gao, B / Gao, C D / Gao, L Q / Gao, Q / Gao, W / Gao, W K / Ge, M M / Geng, L S / Gong, G H / Gou, Q B / Gu, M H / Guo, F L / Guo, X L / Guo, Y Q / Guo, Y Y / Han, Y A / He, H H / He, H N / He, J Y / He, X B / He, Y / Heller, M / Hor, Y K / Hou, B W / Hou, C / Hou, X / Hu, H B / Hu, Q / Hu, S C / Huang, D H / Huang, T Q / Huang, W J / Huang, X T / Huang, X Y / Huang, Y / Huang, Z C / Ji, X L / Jia, H Y / Jia, K / Jiang, K / Jiang, X W / Jiang, Z J / Jin, M / Kang, M M / Ke, T / Kuleshov, D / Kurinov, K / Li, B B / Li, Cheng / Li, Cong / Li, D / Li, F / Li, H B / Li, H C / Li, H Y / Li, J / Li, Jian / Li, Jie / Li, K / Li, W L / Li, X R / Li, Xin / Li, Y Z / Li, Zhe / Li, Zhuo / Liang, E W / Liang, Y F / Lin, S J / Liu, B / Liu, C / Liu, D / Liu, H / Liu, H D / Liu, J / Liu, J L / Liu, J S / Liu, J Y / Liu, M Y / Liu, R Y / Liu, S M / Liu, W / Liu, Y / Liu, Y N / Long, W J / Lu, R / Luo, Q / Lv, H K / Ma, B Q / Ma, L L / Ma, X H / Mao, J R / Min, Z / Mitthumsiri, W / Nan, Y C / Ou, Z W / Pang, B Y / Pattarakijwanich, P / Pei, Z Y / Qi, M Y / Qi, Y Q / Qiao, B Q / Qin, J J / Ruffolo, D / Sáiz, A / Shao, C Y / Shao, L / Shchegolev, O / Sheng, X D / Song, H C / Stenkin, Y V / Stepanov, V / Su, Y / Sun, Q N / Sun, X N / Sun, Z B / Tam, P H T / Tang, Z B / Tian, W W / Wang, C / Wang, C B / Wang, G W / Wang, H G / Wang, H H / Wang, J C / Wang, J S / Wang, K / Wang, L P / Wang, L Y / Wang, P H / Wang, R / Wang, W / Wang, X G / Wang, X Y / Wang, Y / Wang, Y D / Wang, Y J / Wang, Z H / Wang, Z X / Wang, Zhen / Wang, Zheng / Wei, D M / Wei, J J / Wei, Y J / Wen, T / Wu, C Y / Wu, H R / Wu, S / Wu, X F / Wu, Y S / Xi, S Q / Xia, J / Xia, J J / Xiang, G M / Xiao, D X / Xiao, G / Xin, G G / Xin, Y L / Xing, Y / Xiong, Z / Xu, D L / Xu, R F / Xu, R X / Xue, L / Yan, D H / Yan, J Z / Yan, T / Yang, C W / Yang, F / Yang, F F / Yang, H W / Yang, J Y / Yang, L L / Yang, M J / Yang, R Z / Yang, S B / Yao, Y H / Yao, Z G / Ye, Y M / Yin, L Q / Yin, N / You, X H / You, Z Y / Yu, Y H / Yuan, Q / Yue, H / Zeng, H D / Zeng, T X / Zeng, W / Zeng, Z K / Zha, M / Zhang, B / Zhang, B B / Zhang, F / Zhang, H M / Zhang, H Y / Zhang, J L / Zhang, L X / Zhang, L / Zhang, P F / Zhang, P P / Zhang, R / Zhang, S B / Zhang, S R / Zhang, S S / Zhang, X / Zhang, X P / Zhang, Y F / Zhang, Y / Zhang, Yong / Zhao, B / Zhao, J / Zhao, L / Zhao, L Z / Zhao, S P / Zheng, F / Zheng, J H / Zhou, B / Zhou, H / Zhou, J N / Zhou, P / Zhou, R / Zhou, X X / Zhu, C G / Zhu, F R / Zhu, H / Zhu, K J / Zuo, X

    Science (New York, N.Y.)

    2023  Volume 380, Issue 6652, Page(s) 1390–1396

    Abstract: Some gamma-ray bursts (GRBs) have a tera-electron volt (TeV) afterglow, but the early onset of this has not been observed. We report observations with the Large High Altitude Air Shower Observatory (LHAASO) of the bright GRB 221009A, which ... ...

    Abstract Some gamma-ray bursts (GRBs) have a tera-electron volt (TeV) afterglow, but the early onset of this has not been observed. We report observations with the Large High Altitude Air Shower Observatory (LHAASO) of the bright GRB 221009A, which serendipitously occurred within the instrument's field of view. More than 64,000 photons >0.2 TeV were detected within the first 3000 seconds. The TeV flux began several minutes after the GRB trigger and then rose to a peak ~10 seconds later. This was followed by a decay phase, which became more rapid ~650 seconds after the peak. We interpret the emission using a model of a relativistic jet with half-opening angle of ~0.8°. This is consistent with the core of a structured jet and could explain the high isotropic energy of this GRB.
    Language English
    Publishing date 2023-06-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.adg9328
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Exploring Lorentz Invariance Violation from Ultrahigh-Energy γ Rays Observed by LHAASO.

    Cao, Zhen / Aharonian, F / An, Q / Axikegu / Bai, L X / Bai, Y X / Bao, Y W / Bastieri, D / Bi, X J / Bi, Y J / Cai, H / Cai, J T / Cao, Zhe / Chang, J / Chang, J F / Chen, B M / Chen, E S / Chen, J / Chen, Liang /
    Chen, Long / Chen, M J / Chen, M L / Chen, Q H / Chen, S H / Chen, S Z / Chen, T L / Chen, X L / Chen, Y / Cheng, N / Cheng, Y D / Cui, S W / Cui, X H / Cui, Y D / Piazzoli, B D'Ettorre / Dai, B Z / Dai, H L / Dai, Z G / Danzengluobu / Della Volpe, D / Dong, X J / Duan, K K / Fan, J H / Fan, Y Z / Fan, Z X / Fang, J / Fang, K / Feng, C F / Feng, L / Feng, S H / Feng, Y L / Gao, B / Gao, C D / Gao, L Q / Gao, Q / Gao, W / Ge, M M / Geng, L S / Gong, G H / Gou, Q B / Gu, M H / Guo, F L / Guo, J G / Guo, X L / Guo, Y Q / Guo, Y Y / Han, Y A / He, H H / He, H N / He, J C / He, S L / He, X B / He, Y / Heller, M / Hor, Y K / Hou, C / Hou, X / Hu, H B / Hu, S / Hu, S C / Hu, X J / Huang, D H / Huang, Q L / Huang, W H / Huang, X T / Huang, X Y / Huang, Z C / Ji, F / Ji, X L / Jia, H Y / Jiang, K / Jiang, Z J / Jin, C / Ke, T / Kuleshov, D / Levochkin, K / Li, B B / Li, Cheng / Li, Cong / Li, F / Li, H B / Li, H C / Li, H Y / Li, Jian / Li, Jie / Li, K / Li, W L / Li, X R / Li, Xin / Li, Y / Li, Y Z / Li, Zhe / Li, Zhuo / Liang, E W / Liang, Y F / Lin, S J / Liu, B / Liu, C / Liu, D / Liu, H / Liu, H D / Liu, J / Liu, J L / Liu, J S / Liu, J Y / Liu, M Y / Liu, R Y / Liu, S M / Liu, W / Liu, Y / Liu, Y N / Liu, Z X / Long, W J / Lu, R / Lv, H K / Ma, B Q / Ma, L L / Ma, X H / Mao, J R / Masood, A / Min, Z / Mitthumsiri, W / Montaruli, T / Nan, Y C / Pang, B Y / Pattarakijwanich, P / Pei, Z Y / Qi, M Y / Qi, Y Q / Qiao, B Q / Qin, J J / Ruffolo, D / Rulev, V / Sáiz, A / Shao, L / Shchegolev, O / Sheng, X D / Shi, J R / Song, H C / Stenkin, Yu V / Stepanov, V / Su, Y / Sun, Q N / Sun, X N / Sun, Z B / Tam, P H T / Tang, Z B / Tian, W W / Wang, B D / Wang, C / Wang, H / Wang, H G / Wang, J C / Wang, J S / Wang, L P / Wang, L Y / Wang, R N / Wang, W / Wang, X G / Wang, X J / Wang, X Y / Wang, Y / Wang, Y D / Wang, Y J / Wang, Y P / Wang, Z H / Wang, Z X / Wang, Zhen / Wang, Zheng / Wei, D M / Wei, J J / Wei, Y J / Wen, T / Wu, C Y / Wu, H R / Wu, S / Wu, W X / Wu, X F / Xi, S Q / Xia, J / Xia, J J / Xiang, G M / Xiao, D X / Xiao, G / Xiao, H B / Xin, G G / Xin, Y L / Xing, Y / Xu, D L / Xu, R X / Xue, L / Yan, D H / Yan, J Z / Yang, C W / Yang, F F / Yang, J Y / Yang, L L / Yang, M J / Yang, R Z / Yang, S B / Yao, Y H / Yao, Z G / Ye, Y M / Yin, L Q / Yin, N / You, X H / You, Z Y / Yu, Y H / Yuan, Q / Zeng, H D / Zeng, T X / Zeng, W / Zeng, Z K / Zha, M / Zhai, X X / Zhang, B B / Zhang, H M / Zhang, H Y / Zhang, J L / Zhang, J W / Zhang, L X / Zhang, Li / Zhang, Lu / Zhang, P F / Zhang, P P / Zhang, R / Zhang, S R / Zhang, S S / Zhang, X / Zhang, X P / Zhang, Y F / Zhang, Y L / Zhang, Yi / Zhang, Yong / Zhao, B / Zhao, J / Zhao, L / Zhao, L Z / Zhao, S P / Zheng, F / Zheng, Y / Zhou, B / Zhou, H / Zhou, J N / Zhou, P / Zhou, R / Zhou, X X / Zhu, C G / Zhu, F R / Zhu, H / Zhu, K J / Zuo, X

    Physical review letters

    2022  Volume 128, Issue 5, Page(s) 51102

    Abstract: Recently, the LHAASO Collaboration published the detection of 12 ultrahigh-energy γ-ray sources above 100 TeV, with the highest energy photon reaching 1.4 PeV. The first detection of PeV γ rays from astrophysical sources may provide a very sensitive ... ...

    Abstract Recently, the LHAASO Collaboration published the detection of 12 ultrahigh-energy γ-ray sources above 100 TeV, with the highest energy photon reaching 1.4 PeV. The first detection of PeV γ rays from astrophysical sources may provide a very sensitive probe of the effect of the Lorentz invariance violation (LIV), which results in decay of high-energy γ rays in the superluminal scenario and hence a sharp cutoff of the energy spectrum. Two highest energy sources are studied in this work. No signature of the existence of the LIV is found in their energy spectra, and the lower limits on the LIV energy scale are derived. Our results show that the first-order LIV energy scale should be higher than about 10^{5} times the Planck scale M_{Pl} and that the second-order LIV scale is >10^{-3}M_{Pl}. Both limits improve by at least one order of magnitude the previous results.
    Language English
    Publishing date 2022-02-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.128.051102
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  5. Article ; Online: Peta-electron volt gamma-ray emission from the Crab Nebula.

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    Science (New York, N.Y.)

    2021  Volume 373, Issue 6553, Page(s) 425–430

    Abstract: The Crab Nebula is a bright source of gamma rays powered by the Crab Pulsar's rotational energy through the formation and termination of a relativistic electron-positron wind. We report the detection of gamma rays from this source with energies from 5 × ... ...

    Abstract The Crab Nebula is a bright source of gamma rays powered by the Crab Pulsar's rotational energy through the formation and termination of a relativistic electron-positron wind. We report the detection of gamma rays from this source with energies from 5 × 10
    Language English
    Publishing date 2021-07-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abg5137
    Database MEDical Literature Analysis and Retrieval System OnLINE

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