Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-08-19
Phys.Rev. D58 (1998) 104006
Physics
High Energy Physics
High Energy Physics - Theory
minor typo errors were corrected, 20 pages no figure, RevTeX
Scientific paper
10.1103/PhysRevD.58.104006
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.
Kim Jin Young
Lee Hyun Woo
Myung Yun Soo
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