Greybody factors in a rotating black-hole background-II : fermions and gauge bosons

Details Greybody factors in a rotating black-hole background-II : fermions and gauge bosons Greybody factors in a rotating black-hole background-II : fermions and gauge bosons

2007-07-12

arxiv.org/abs/0707.1768v2

Phys.Rev.D76:104013,2007

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, 8 figures, added references

Scientific paper

10.1103/PhysRevD.76.104013

We study the emission of fermion and gauge boson degrees of freedom on the brane by a rotating higher-dimensional black hole. Using matching techniques, for the near-horizon and far-field regime solutions, we solve analytically the corresponding field equations of motion. From this, we derive analytical results for the absorption probabilities and Hawking radiation emission rates, in the low-energy and low-rotation case, for both species of fields. We produce plots of these, comparing them to existing exact numerical results with very good agreement. We also study the total absorption cross-section and demonstrate that, as in the non-rotating case, it has a different behaviour for fermions and gauge bosons in the low-energy limit, while it follows a universal behaviour -- reaching a constant, spin-independent, asymptotic value -- in the high-energy regime.

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