Lorentz covariance on galactic scale

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Lorentz covariance on galactic scale

Postby hyksos on August 5th, 2018, 2:07 pm 

Study of high-energy neutrinos again proves Einstein right
Most thorough test to date finds no Lorentz violation in high-energy neutrinos


I've written about this property of fields in our universe in several places on this forum in the distant past. The basic gist of "Lorentz Covariance" (sometimes Lorentz Symmetry) is that charged particles do not deposit waves into space like a dropped stone deposits a wave into a pond. Instead, when a charged particle emits light, it is rather as if the particle "drags" the field around with it as it moves.

One consequence is that if you are moving in a train with the windows blocked out, there is no experiment you can perform inside the train that can determine the direction you are moving, or even if you are in motion at all. This property of our universe is a cornerstone of Special Relativity (as the article indicates).

One might have a lingering suspicion that Lorentz Covariance may only describe physics at distances near the "size of trains" , but that once you consider distances like those between galaxies, something breaks down and more intuitive physics takes over.

The above test measured neutrinos that originated from distant galaxies. It almost entirely rules out that possibility, even at galactic distances. It actually rules it out to one part in 1036.
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