Lorentz invariance on trial

The various aspects of the Lorentz Invariance transformations are discussed. Special relativity postulates that all the laws of physics are invariant under Lorentz transformations. General relativity includes the invariance through Einstein's equivalence principle, which implies that any experiment conducted in a small, freely falling laboratory is invariant under Lorentz transformations. It is assumed that low-energy physics can be described by the Lorentz-invariant dynamics of the standard model plus a number of possible background fields.