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. 2022 Feb 4;128(5):051102.
doi: 10.1103/PhysRevLett.128.051102.

Exploring Lorentz Invariance Violation from Ultrahigh-Energy γ Rays Observed by LHAASO

Zhen Cao  1   2   3 F Aharonian  4   5 Q An  6   7 Axikegu  8 L X Bai  9 Y X Bai  1   3 Y W Bao  10 D Bastieri  11 X J Bi  1   2   3 Y J Bi  1   3 H Cai  12 J T Cai  11 Zhe Cao  6   7 J Chang  13 J F Chang  1   3   6 B M Chen  14 E S Chen  1   2   3 J Chen  9 Liang Chen  1   2   3 Liang Chen  15 Long Chen  8 M J Chen  1   3 M L Chen  1   3   6 Q H Chen  8 S H Chen  1   2   3 S Z Chen  1   3 T L Chen  16 X L Chen  1   2   3 Y Chen  10 N Cheng  1   3 Y D Cheng  1   3 S W Cui  14 X H Cui  17 Y D Cui  18 B D'Ettorre Piazzoli  19 B Z Dai  20 H L Dai  1   3   6 Z G Dai  7 Danzengluobu  16 D Della Volpe  21 X J Dong  1   3 K K Duan  13 J H Fan  11 Y Z Fan  13 Z X Fan  1   3 J Fang  20 K Fang  1   3 C F Feng  22 L Feng  13 S H Feng  1   3 Y L Feng  13 B Gao  1   3 C D Gao  22 L Q Gao  1   2   3 Q Gao  16 W Gao  22 M M Ge  20 L S Geng  1   3 G H Gong  23 Q B Gou  1   3 M H Gu  1   3   6 F L Guo  15 J G Guo  1   2   3 X L Guo  8 Y Q Guo  1   3 Y Y Guo  1   2   3   13 Y A Han  24 H H He  1   2   3 H N He  13 J C He  1   2   3 S L He  11 X B He  18 Y He  8 M Heller  21 Y K Hor  18 C Hou  1   3 X Hou  25 H B Hu  1   2   3 S Hu  9 S C Hu  1   2   3 X J Hu  23 D H Huang  8 Q L Huang  1   3 W H Huang  22 X T Huang  22 X Y Huang  13 Z C Huang  8 F Ji  1   3 X L Ji  1   3   6 H Y Jia  8 K Jiang  6   7 Z J Jiang  20 C Jin  1   2   3 T Ke  1   3 D Kuleshov  26 K Levochkin  26 B B Li  14 Cheng Li  6   7 Cong Li  1   3 F Li  1   3   6 H B Li  1   3 H C Li  1   3 H Y Li  7   13 Jian Li  7 Jie Li  1   3   6 K Li  1   3 W L Li  22 X R Li  1   3 Xin Li  6   7 Xin Li  8 Y Li  9 Y Z Li  1   2   3 Zhe Li  1   3 Zhuo Li  27 E W Liang  28 Y F Liang  28 S J Lin  18 B Liu  7 C Liu  1   3 D Liu  22 H Liu  8 H D Liu  24 J Liu  1   3 J L Liu  29 J S Liu  18 J Y Liu  1   3 M Y Liu  16 R Y Liu  10 S M Liu  8 W Liu  1   3 Y Liu  11 Y N Liu  23 Z X Liu  9 W J Long  8 R Lu  20 H K Lv  1   3 B Q Ma  27 L L Ma  1   3 X H Ma  1   3 J R Mao  25 A Masood  8 Z Min  1   3 W Mitthumsiri  30 T Montaruli  21 Y C Nan  22 B Y Pang  8 P Pattarakijwanich  30 Z Y Pei  11 M Y Qi  1   3 Y Q Qi  14 B Q Qiao  1   3 J J Qin  7 D Ruffolo  30 V Rulev  26 A Sáiz  30 L Shao  14 O Shchegolev  26   31 X D Sheng  1   3 J R Shi  1   3 H C Song  27 Yu V Stenkin  26   31 V Stepanov  26 Y Su  13 Q N Sun  8 X N Sun  28 Z B Sun  32 P H T Tam  18 Z B Tang  6   7 W W Tian  2   17 B D Wang  1   3 C Wang  32 H Wang  8 H G Wang  11 J C Wang  25 J S Wang  29 L P Wang  22 L Y Wang  1   3 R N Wang  8 W Wang  18 W Wang  12 X G Wang  28 X J Wang  1   3 X Y Wang  10 Y Wang  8 Y D Wang  1   3 Y J Wang  1   3 Y P Wang  1   2   3 Z H Wang  9 Z X Wang  20 Zhen Wang  29 Zheng Wang  1   3   6 D M Wei  13 J J Wei  13 Y J Wei  1   2   3 T Wen  20 C Y Wu  1   3 H R Wu  1   3 S Wu  1   3 W X Wu  8 X F Wu  13 S Q Xi  1   3 J Xia  7   13 J J Xia  8 G M Xiang  2   15 D X Xiao  16 G Xiao  1   3 H B Xiao  11 G G Xin  12 Y L Xin  8 Y Xing  15 D L Xu  29 R X Xu  27 L Xue  22 D H Yan  25 J Z Yan  13 C W Yang  9 F F Yang  1   3   6 J Y Yang  18 L L Yang  18 M J Yang  1   3 R Z Yang  7 S B Yang  20 Y H Yao  9 Z G Yao  1   3 Y M Ye  23 L Q Yin  1   3 N Yin  22 X H You  1   3 Z Y You  1   2   3 Y H Yu  22 Q Yuan  13 H D Zeng  13 T X Zeng  1   3   6 W Zeng  20 Z K Zeng  1   2   3 M Zha  1   3 X X Zhai  1   3 B B Zhang  10 H M Zhang  10 H Y Zhang  22 J L Zhang  17 J W Zhang  9 L X Zhang  11 Li Zhang  20 Lu Zhang  14 P F Zhang  20 P P Zhang  14 R Zhang  7   13 S R Zhang  14 S S Zhang  1   3 X Zhang  10 X P Zhang  1   3 Y F Zhang  8 Y L Zhang  1   3 Yi Zhang  1   13 Yong Zhang  1   3 B Zhao  8 J Zhao  1   3 L Zhao  6   7 L Z Zhao  14 S P Zhao  13   22 F Zheng  32 Y Zheng  8 B Zhou  1   3 H Zhou  29 J N Zhou  15 P Zhou  10 R Zhou  9 X X Zhou  8 C G Zhu  22 F R Zhu  8 H Zhu  17 K J Zhu  1   2   3   6 X Zuo  1   3 LHAASO Collaboration
Affiliations

Exploring Lorentz Invariance Violation from Ultrahigh-Energy γ Rays Observed by LHAASO

Zhen Cao et al. Phys Rev Lett. .

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.

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