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 105 times the Planck scale MPl and that the second-order LIV scale is >10-3MPl. Both limits improve by at least one order of magnitude the previous results.
Recommended Citation
"Exploring Lorentz Invariance Violation From Ultrahigh-Energy Γ Rays Observed By LHAASO," Physical Review Letters, vol. 128, no. 5, article no. 051102, American Physical Society, Feb 2022.
The definitive version is available at https://doi.org/10.1103/PhysRevLett.128.051102
Department(s)
Physics
International Standard Serial Number (ISSN)
1079-7114; 0031-9007
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 American Physical Society, All rights reserved.
Publication Date
04 Feb 2022
PubMed ID
35179919
Comments
National Natural Science Foundation of China, Grant 11635011