Eur. Phys. J. C (2010) 65: 275-279
https://doi.org/10.1140/epjc/s10052-009-1185-x

Regular Article - Theoretical Physics

Absorption cross section in the topologically massive gravity at the critical point

¹ Division of Computational Science in Mathematics, National Institute for Mathematical Sciences, Daejeon, 305-340, South Korea
² Department of Physics, Sogang University, C.P.O. Box 1142, Seoul, 100-611, South Korea
³ Center for Quantum Spacetime, Sogang University, Seoul, 121-742, South Korea

^* e-mail: wtkim@mail.sogang.ac.kr

Received: 5 May 2009
Revised: 30 September 2009
Published online: 29 October 2009

Abstract

The absorption cross section for the warped AdS₃ black hole background shows that it is larger than the area even if the s-wave limit is considered. It raises some question whether the deviation from the areal cross section is due to the warped configuration of the geometry or the rotating coordinate system, where these two effects are mixed up in the warped AdS₃ black hole. So, we study the low-frequency scattering dynamics of propagating scalar fields under the warped AdS₃ background at the critical point which reduces to the BTZ black hole in the rotating frame without the warped factor, which shows that the deformation effect at the critical point does not appear.