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- W3200003927 abstract "Recently a series of studies on high energy gamma-ray burst (GRB) photons suggest a light speed variation with linear energy dependence at the Lorentz violation scale of 3.6×1017 GeV, with subluminal propagation of high energy photons in cosmological space. We propose stringy space–time foam as a possible interpretation for this light speed variation. In such a string-inspired scenario, bosonic photon open-string travels in vacuo at an infraluminal speed with an energy dependence suppressed by a single power of the string mass scale, due to the foamy structure of space–time at small scales, as described by D-brane objects in string theory. We present a derivation of this deformed propagation speed of the photon field in the infrared (IR) regime. We show that the light speed variation, revealed in the previous studies on GRBs time-delay data, can be well described within such a string approach towards space–time foam. We also derive the value of the effective quantum-gravity mass in this framework, and give a qualitative study on the theory-dependent coefficients. We comment that stringent constraints on Lorentz violation in the photon sector from complementary astrophysical observations can also be explained and understood in the space–time foam context." @default.
- W3200003927 created "2021-09-27" @default.
- W3200003927 creator A5004361140 @default.
- W3200003927 creator A5012114599 @default.
- W3200003927 date "2021-07-01" @default.
- W3200003927 modified "2023-10-02" @default.
- W3200003927 title "Light speed variation with brane/string-inspired space-time foam" @default.
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- W3200003927 doi "https://doi.org/10.1016/j.rinp.2021.104380" @default.
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