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Hawking radiation for a Proca field in D dimensions. II. Charged field in a brane charged black hole

2013; American Physical Society; Volume: 87; Issue: 4 Linguagem: Inglês

10.1103/physrevd.87.044011

1550-7998

Mengjie Wang, Marco O. P. Sampaio, Carlos Herdeiro,

Cosmology and Gravitation Theories

We generalize our first analysis of the wave equation for a massive vector boson in the background of a $D$-dimensional Schwarzschild black hole [C. Herdeiro, M. O. P. Sampaio, and M. Wang, Phys. Rev. D 85, 024005 (2012)], by adding charge to both the field and the black hole, on the ($3+1$)-dimensional Standard Model brane. A detailed numerical study is performed to obtain the transmission factor for the coupled (as well as decoupled) system of equations describing the Proca field modes, varying the angular momentum number, mass, charge, and space-time dimensions. A qualitatively new feature arising from the introduction of charge is the appearance of superradiant modes, which we investigate. We then compute the Hawking fluxes and analyze the effect of the charge. In particular, we observe an inverted charge splitting effect for small energies and for two or more extra dimensions. For neutral fields, we compare the emission of massive particles with spins up to one and also compare the Proca bulk-to-brane ratio of energy emission, showing that, as for a scalar field, most of the energy is emitted on the brane.