Strong constraints on Lorentz violation using new γ-ray observations around PeV

• The tiny modification of dispersion relation induced by Lorentz violation (LV) is an essential topic in quantum gravity (QG) theories, which can be magnified into significant effects when dealing with astrophysical observations at high energies and long propagation distances. LV would lead to photon decay at high energies; therefore, observations of high-energy photons could constrain LV or even QG theories. The Large High Altitude Air Shower Observatory (LHAASO) is the most sensitive gamma-array instrument currently operating above 100 TeV. Recently, LHAASO reported the detection of 12 sources above 100 TeV with maximum photon energy exceeding 1 PeV. According to these observations, the most stringent restriction is achieved in this study, i.e., limiting the LV energy scale to $1.7\times10^{33}$ eV, which is over 139,000 times that of the Planck energy, and achieving an improvement of approximately 1.9 orders of magnitude over previous limits.
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Liang Chen, Zheng Xiong, Cong Li, SongZhan Chen and HuiHai He. Strong constraints on Lorentz violation using new γ-ray observations around PeV[J]. Chinese Physics C. doi: 10.1088/1674-1137/ac1166
Liang Chen, Zheng Xiong, Cong Li, SongZhan Chen and HuiHai He. Strong constraints on Lorentz violation using new γ-ray observations around PeV[J]. Chinese Physics C.
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通讯作者: 陈斌, bchen63@163.com
• 1.

沈阳化工大学材料科学与工程学院 沈阳 110142

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Strong constraints on Lorentz violation using new γ-ray observations around PeV

• 1. Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
• 2. University of Chinese Academy of Sciences, Beijing 100049, China
• 3. TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China

Abstract: The tiny modification of dispersion relation induced by Lorentz violation (LV) is an essential topic in quantum gravity (QG) theories, which can be magnified into significant effects when dealing with astrophysical observations at high energies and long propagation distances. LV would lead to photon decay at high energies; therefore, observations of high-energy photons could constrain LV or even QG theories. The Large High Altitude Air Shower Observatory (LHAASO) is the most sensitive gamma-array instrument currently operating above 100 TeV. Recently, LHAASO reported the detection of 12 sources above 100 TeV with maximum photon energy exceeding 1 PeV. According to these observations, the most stringent restriction is achieved in this study, i.e., limiting the LV energy scale to $1.7\times10^{33}$ eV, which is over 139,000 times that of the Planck energy, and achieving an improvement of approximately 1.9 orders of magnitude over previous limits.

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