Gauge theory description of D-brane black holes: emergence of the effective SCFT and Hawking radiation

Details Gauge theory description of D-brane black holes: emergence of the effective SCFT and Hawking radiation Gauge theory description of D-brane black holes: emergence of the effective SCFT and Hawking radiation

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998stin...0015461h&link_type=abstract

Technical Report, DE98-626898; IC-98/15; CERN-TH-97-344

Physics

Condensed Matter

Statistical Mechanics

Gauge Theory, Black Holes (Astronomy), Decay Rates, Gauge Invariance, Statistical Mechanics, String Theory, Degrees Of Freedom, Supersymmetry, Field Theory (Physics)

Scientific paper

We study the hypermultiplet moduli space of an N=4, U(Q1) x U(Q5 ) gauge theory in 1 + 1 dimensions to extract the effective SCFT description of near extremal 5-dimensional black holes modelled by a collection D1- and D5-branes. On the moduli space, excitations with fractional momenta arise due to a residual discrete gauge invariance. It is argued that, in the infra-red, the lowest energy excitations are described by an effective c = 6, N = 4 SCFT on T(sup 4), also valid in the large black hole regime. The ''effective string tension'' is obtained using T-duality covariance. While at the microscopic level, minimal scalars do not couple to (1,5) strings, in the effective theory a coupling is induced by (1,1) and (5,5) strings, leading to Hawking radiation. These considerations imply that, at least for such black holes, the calculation of the Hawking decay rate for minimal scalars has a sound foundation in string theory and statistical mechanics and, hence, there is no information loss.

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