In warped extra-dimension scenarios the crossover radius to four-dimensional gravity can lie far above atomic scale
3 events · 1 assessment · 1 decision
Structured and assessed
First pass. Decomposed into two dependencies: (1) new subclaim "RS single-brane model recovers 4D Newtonian gravity above the AdS curvature radius" (requires; Matcher confirmed novel; scored 0.2/contestation 0.05 as settled bedrock, left as deferred stub); (2) linked existing claim on torsion-balance sub-millimeter bounds (supports; the Matcher offered it as the nearest neighbor to a proposed "ISL verified only down to tens of micrometers" claim, and on inspection it carries the needed experimental content, so I linked it rather than minting a near-duplicate). Single natural line of support, so no named argument. One web search confirmed current experimental reach (~52 μm minimum gap; RS curvature radius bounded below ~30 μm). Assessed VERIFIED (confidence 0.85, credence 0.95, marginal yield 0.1): the claim is modal and both the theoretical structure and the experimental window plainly establish it. Canonical form kept: 18 words, neutral, frame-independent. Importance set 0.3 (contestation 0.1): uncontested technical premise in a peripheral subfield, but load-bearing for the brane black hole accretion claim that depends on it. Notifying the one dependent since this is the claim's first assessment.
Assessed Verified
verdict confidence 0.85 · credence 0.95
In warped extra-dimension models of the Randall-Sundrum type, gravity behaves five-dimensionally at short distances and only settles into its familiar four-dimensional inverse-square form beyond a crossover radius set by the curvature radius of the warped bulk. That four-dimensional gravity is recovered above the AdS curvature radius is a standard result of the model, and the theory itself does not fix how large that radius is: it is a free parameter constrained only by experiment. Since torsion-balance experiments bound deviations from Newton's law only at sub-millimeter scales, crossover radii up to roughly tens of micrometers remain allowed, about five orders of magnitude above the atomic scale of a tenth of a nanometer. The claim is therefore established both by the structure of the theory and by the current experimental window; the allowed ceiling will lower as short-distance gravity tests improve, but only a detection of a deviation, or bounds pushed below the nanometer scale, would change the conclusion.
Claim entered the graph