yeah... 118 years later since the publication of SR, Einstein still standing to debunk all attemps to debunk him... Lorentz invariance really hard core and more formally, the Lorentz group! any1 out there can compare this absolute precision of 0.1−0.8% to the thickness of human hair?
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Bounds on Lorentz-violating couplings are extracted, and found to be compatible with Lorentz invariance with an absolute precision of 0.1−0.8%
. This search can also be interpreted as a precision test of special relativity with top quarks, improving precision by two orders of magnitude over a previous such measurement.
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https://cds.cern.ch/record/2859658
the idea of violating Lorentz invariance has been around even in the late 1990s
https://arxiv.org/abs/hep-ph/9809521
any1 out there who wants to know how is rest mass distinguished from "relativistic" mass this wiki entry helps... i must point out that i am usually inclined to call rest mass as invariant mass
https://en.wikipedia.org/wiki/Mass_in_special_relativity
loosely call m the rest mass of the particle and Lorentz symmetry says that this property of the particle is invariant as we apply lorentz group of transformations on the components of the four-momentum. that is, this mass stays as it is for an observer regardless of his motion relative to the particle he is watching. the thing i’m a little curious about is that what happens if lorentz symmetry breaks for as far as i am concerned, lorentz symmetry keeps the kinematics simple and my belief is that this kind of simplicity is unbreakable!