Einstein warped products in 4D are classified algebraically via curvature matrix blocks into Petrov types (3+1 generically type I, 2+2 type D, 1+3 type O), with closed Riemannian half-conformally flat cases required to be flat.
org/doi/10.1103/PhysRevLett.83.4690
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No evidence found; excludes semiclassical black holes below 8.4-11.4 TeV and string balls below 9.0-10.7 TeV at 95% CL, and caps the quark-quark sphaleron fraction above 9 TeV at 0.0034.
Conformal and scale-invariant gravity theories in d dimensions have distinct properties from 4D analogues, enabled by a new formulation method.
Positive tidal charge reduces Blandford-Znajek power by up to 15.2% while negative tidal charge increases it by up to 66.5% compared to Kerr black holes of equal mass and angular velocity.
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Warped Product Einstein Manifolds in Four Dimensions
Einstein warped products in 4D are classified algebraically via curvature matrix blocks into Petrov types (3+1 generically type I, 2+2 type D, 1+3 type O), with closed Riemannian half-conformally flat cases required to be flat.
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A search for microscopic black holes, string balls, and sphalerons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
No evidence found; excludes semiclassical black holes below 8.4-11.4 TeV and string balls below 9.0-10.7 TeV at 95% CL, and caps the quark-quark sphaleron fraction above 9 TeV at 0.0034.
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How to deal with conformal and pure scale-invariant theories of gravity in d dimensions?
Conformal and scale-invariant gravity theories in d dimensions have distinct properties from 4D analogues, enabled by a new formulation method.
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Effects of tidal charge on Blandford-Znajek process around braneworld black holes
Positive tidal charge reduces Blandford-Znajek power by up to 15.2% while negative tidal charge increases it by up to 66.5% compared to Kerr black holes of equal mass and angular velocity.
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