The momentum-space thermal four-point response function of scalar primaries in an arbitrary 2D CFT is expressed as an infinite sum over global conformal blocks of Meijer G-functions.
Absorption of photons and fermions by black holes in four dimensions
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The absorption of photons and fermions into four-dimensional black holes is described by equations which in certain cases can be analyzed using dyadic index techniques. The resulting absorption cross-sections for near-extremal black holes have a form at low energies suggestive of the effective string model. A coupling to the effective string is proposed for spin-0 and spin-1/2 fields of pure N=4 supergravity which respects the unbroken supersymmetry of extreme black holes and correctly predicts dilaton, axion, and fermion cross-sections up to an overall normalization.
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Effective dynamics of open 2D CFTs
The momentum-space thermal four-point response function of scalar primaries in an arbitrary 2D CFT is expressed as an infinite sum over global conformal blocks of Meijer G-functions.