Model-Independent Constraints on Lorentz Invariance Violation via the Cosmographic Approach

Understand

Since Lorentz invariance plays an important role in modern physics, it is of interest to test the possible Lorentz invariance violation (LIV).

• The time-lag (the arrival time delay between light curves in different energy bands) of Gamma-ray bursts (GRBs) has been extensively used to this end.
• However, to our best knowledge, one or more particular cosmological models were assumed {\it a priori} in (almost) all of the relevant works in the literature.
• So, this makes the results on LIV in those works model-dependent and hence not so robust in fact.