2025/11/07 by Hua, Yu-Chen, Bi, Xiao-Jun, Yang, Yu-Ming +1
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Noncommutative and Quantum Gravity Theories
paper · doi:10.48550/arxiv.2511.05062
openalex publication_date 2025/11/07 · openalex created_date 2025/11/11 · openalex updated_date 2026/07/28
The Lorentz invariance violation (LIV) predicted by some quantum gravity theories would manifest as an energy-dependent speed of light, which may potentially distort the observed temporal profile of photons from astrophysical sources at cosmological distances. The dispersion cancellation (DisCan) algorithm offers a powerful methodology for investigating such effects by employing quantities such as Shannon entropy, which reflects the initial temporal characteristics. In this study, we apply the DisCan algorithm to search for LIV effects in the LHAASO observations of GRB 221009A, combining data from both the WCDA and KM2A detectors that collectively span an energy range of ∼ 0.2-13 TeV. Our analysis accounts for the uncertainties from both energy resolution and temporal binning. We derive 95% confidence level lower limits on the LIV energy scale of E_\rmQG/1019~GeV>21.1 (13.8) for the first-order subluminal (superluminal) scenario, and E_\rmQG/1011~GeV> 14.9 (13.7) for the second-order subluminal (superluminal) scenario.