Sensitivity study forecasts that CTA can measure EBL absorption with high precision, detect IGMF signatures, and explore new parameter space for ALPs and LIV.
Improved limits on Lorentz invariance violation from astrophysical gamma-ray sources
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abstract
Lorentz invariance (LI) has a central role in science and its violation (LIV) at some high-energy scale has been related to possible solutions for several of the most intriguing puzzles in nature such as dark matter, dark energy, cosmic rays generation in extreme astrophysical objects and quantum gravity. We report on a search for LIV signal based on the propagation of gamma rays from astrophysical sources to Earth. An innovative data analysis is presented which allowed us to extract unprecedented information from the most updated data set composed of 111 energy spectra of 38 different sources measured by current gamma-ray observatories. No LIV signal was found, and we show that the data are best described by LI assumption. We derived limits for the LIV energy scale at least 3 times better than the ones currently available in the literature for subluminal signatures of LIV in high-energy gamma rays.
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astro-ph.HE 1years
2019 1verdicts
UNVERDICTED 1representative citing papers
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Testing cosmology and fundamental physics with the Cherenkov Telescope Array
Sensitivity study forecasts that CTA can measure EBL absorption with high precision, detect IGMF signatures, and explore new parameter space for ALPs and LIV.