Journal
PHYSICS LETTERS B
Volume 760, Issue -, Pages 602-604Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2016.07.044
Keywords
Light speed; Gamma ray burst; High energy photon; Lorentz invariance violation
Funding
- National Natural Science Foundation of China [11120101004, 11475006]
- National Fund for Fostering Talents of Basic Science [J1103205, J1103206]
- Undergraduate Research Fund of Education Foundation of Peking University
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It is postulated in Einstein's relativity that the speed of light in vacuum is a constant for all observers. However, the effect of quantum gravity could bring an energy dependence of light speed. Even a tiny speed variation, when amplified by the cosmological distance, may be revealed by the observed time lags between photons with different energies from astrophysical sources. From the newly detected long gamma ray burst GRB 160509A, we find evidence to support the prediction for a linear form modification of light speed in cosmological space. (C) 2016 The Author(s). Published by Elsevier B.V.
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