Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-01-18
Phys.Lett.B635:39-49,2006
Physics
High Energy Physics
High Energy Physics - Theory
17 pages, 2 figures, minor corrections, accepted by Phys. Lett. B
Scientific paper
10.1016/j.physletb.2006.02.030
We consider the evaporation of (4+n)-dimensional non-rotating black holes into gravitons. We calculate the energy emission rate for gravitons in the bulk obtaining analytical solutions of the master equation satisfied by all three types (S,V,T) of gravitational perturbations. Our results, valid in the low-energy regime, show a vector radiation dominance for every value of n, while the relative magnitude of the energy emission rate of the subdominant scalar and tensor radiation depends on n. The low-energy emission rate in the bulk for gravitons is well below that for a scalar field, due to the absence of the dominant l=0,1 modes from the gravitational spectrum. Higher partial waves though may modify this behaviour at higher energies. The calculated low-energy emission rate, for all types of degrees of freedom decreases with n, although the full energy emission rate, integrated over all frequencies, is expected to increase with n, as in the previously studied case of a bulk scalar field.
Creek S.
Efthimiou O.
Kanti Panagiota
Tamvakis Kyriakos
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