Massless vs. Massive Hawking Radiation in AdS$_2$ Spacetime
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We study massless and massive Hawking radiations on a two-dimensional AdS spacetime. For the massless case, the quantum stress-energy tensor of a massless scalar field on the AdS background is calculated, and the expected null radiation is obtained. However, for the massive case, the scattering analysis is performed in order to calculate the absorption and reflection coefficients which are related to statistical Hawking temperature. On the contrary to the massless case, we obtain a nonvanishing massive radiation.
13 pages, revtex, to appear in Phys. Lett. B
13 pages, revtex, to appear in Phys. Lett. B