The role of fixed scalars in scattering off a 5D black hole

Abstract

We discuss the role of fixed scalars($\nu ,\lambda$) in scattering off a five-dimensional balck hole. The issue is to explain the disagreement of the greybody factor for $\lambda$ between the semiclassical and effective string calculations. In the effective string approach, this is related to the operators with dimension (3,1) and (1,3). On the semiclassical calculation, this originates from a complicated mixing between $\lambda$ and other fields. Hence it may depend on the decoupling procedure. It is shown that $\lambda$ depends on the gauge choices such as the harmonic, dilaton gauges, and the Krasnitz-Klebanov setting for $h_{\mu \nu }$. It turns out that $\nu$ plays a role of test field well, while the role of $\lambda$ is obscure.

minor typo errors were corrected, 20 pages no figure, RevTeX

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Cited by in corpus (7)

• Large N Field Theories, String Theory and Gravity
• Microscopic Formulation of Black Holes in String Theory
• Absorption and Hawking Radiation of Minimal and Fixed Scalars, and AdS/CFT correspondence
• No absorption in de Sitter space
• Schwarzschild black hole in the dilatonic domain wall
• Scattering from an AdS_3 bubble and an exact AdS_3
• Nonpropagation of tachyon on the BTZ black hole in type 0B string theory