Lorentz invariance violation: The latest Fermi results and the GRB/ AGN complementarity

Because they are bright and distant, Gamma-ray Bursts (GRBs) have been used for more than a decade to test propagation of photons and to constrain relevant Quantum Gravity (QG) models in which the velocity of photons in vacuum can depend on their energy. With its unprecedented sensitivity and energy...

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Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2014-04, Vol.742, p.165-168
Main Authors: Bolmont, J., Vasileiou, V., Jacholkowska, A., Piron, F., Couturier, C., Granot, J., Stecker, F.W., Cohen-Tanugi, J., Longo, F.
Format: Article
Language:English
Subjects:
Accelerators
Constraining
Dispersions
Energy use
Fermi-LAT
Gamma ray bursts
Gamma-ray burst
Lorentz invariance violation
Photons
Quantum gravity
Satellites
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Summary:Because they are bright and distant, Gamma-ray Bursts (GRBs) have been used for more than a decade to test propagation of photons and to constrain relevant Quantum Gravity (QG) models in which the velocity of photons in vacuum can depend on their energy. With its unprecedented sensitivity and energy coverage, the Fermi satellite has provided the most constraining results on the QG energy scale so far. In this talk, the latest results obtained from the analysis of four bright GRBs observed by the Large Area Telescope will be reviewed. These robust results, cross-checked using three different analysis techniques set the limit on QG energy scale at EQG,1>7.6 times the Planck energy for linear dispersion and EQG,2>1.3×1011GeV for quadratic dispersion (95% CL). After describing the data and the analysis techniques in use, results will be discussed and confronted to latest constraints obtained with Active Galactic Nuclei.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2013.10.088