Re: The HOAX of GR effects in GPS and other artificial satellites,

On Wed, 18 Sep 2024 13:06:56 +0000, gharnagel wrote:

On Wed, 18 Sep 2024 3:56:44 +0000, ProkaryoticCaspaseHomolog wrote:

>
Two paragraphs that I wrote for Wikipedia which are nearly unchanged
from when I first wrote them a decade ago:
"Proposals that may lead to a quantum theory of gravity such as string
theory and loop quantum gravity predict violations of the weak
equivalence principle because they contain many light scalar fields
with long Compton wavelengths, which should generate fifth forces and
variation of the fundamental constants. Heuristic arguments suggest
that the magnitude of these equivalence principle violations could be
in the 10−13 to 10−18 range.
"Currently envisioned tests of the weak equivalence principle are
approaching a degree of sensitivity such that non-discovery of a
violation would be just as profound a result as discovery of a
violation. Non-discovery of equivalence principle violation in this
range would suggest that gravity is so fundamentally different from
other forces as to require a major reevaluation of current attempts to
unify gravity with the other forces of nature. A positive detection,
on the other hand, would provide a major guidepost towards unification."

>
Well, it looks like 10^-13 to 10^-14 predictions are in very great
doubt.  Do you know which theories are predicting violations this big?

See https://hal.science/hal-04105176v1
Few theories have been actually "disproven" by MICROSCOPE results, but
some theories have been constrained to somewhat "unnatural" regions of
parameter space. For instance, in regards to the "runaway dilaton"
model, "...current data already exclude couplings between the runaway
dilaton and the dark sector of order unity, which would be their
natural value."