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Equation 25 · Part 1 · The Corner of the Equivalence Principle No Experiment Has Touched

Symbol hateta_coh

η^coh\hat\eta_{coh}
η^coh\hat\eta_{coh}

What this part means

hatetaca_coh is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Its job in the formula

hatetaca_coh is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

…experiments and columns for the five components, and four columns get real entries: ηcl\eta_{cl} constrained at the 10^{-15} level by MICROSCOPE, η^diag\hat\eta_{diag} constrained by every dual-species and clock test in the list, η^coh\hat\eta_{coh} constrained at the low- 10^{-9} level by Rosi and colleagues’ internal-superposition test, η^sup\hat\eta_{sup} constrained by Overstreet and colleagues’ gravitational Aharonov-Bohm result. The fifth column, η^ent\hat\eta_{ent} , has nothing in it — not a weak bound, not a preliminary number,…

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