Black Holes as Fundamental Strings: Comparing the Absorption of Scalars

Abstract

The recently proposed ``correspondence principle'' of Horowitz and Polchinski provides a concrete means to relate (among others) black holes with electric NS-NS charges to fundamental strings and correctly match their entropies. We test further this correspondence by examining the greybody factors in the absorption rates of neutral, minimally coupled scalars by a near extremal black hole. Perhaps surprisingly, the results disagree in general with the absorption by weakly coupled strings. Though this does not disprove the correspondence, it indicates that it might not be simple in this region of the black hole parameter space.

20 pages, LaTeX. Few minor changes. Version to appear in PRD

References in corpus (5)

• A String Model of Black Hole Microstates
• D-branes and Near Extremal Black Holes at Low Energies
• Evolution of near extremal black holes
• Intermediate Scalars and the Effective String Model of Black Holes
• High Energy Effects on D-Brane and Black Hole Emission Rates

Cited by in corpus (9)

• General Rotating Black Holes in String Theory: Greybody Factors and Event Horizons
• Self Gravitating Fundamental Strings
• The quantum structure of black holes
• The Bekenstein Formula and String Theory (N-brane Theory)
• Can nonextremal Reissner-Nordstrom black hole become extremal by assimilating infalling charged particle and shell?
• Boosts, Schwarzschild Black Holes and Absorption cross-sections in M theory
• The role of fixed scalars in scattering off a 5D black hole
• Propagation of Scalars in Non-extremal Black Hole and Black p-brane Geometries
• Black Holes with Multiple Charges and the Correspondence Principle