Greybody factors for brane scalar fields in a rotating black hole background

In this paper, we consider rotating black hole in three dimensions with a scalar charge and discuss about the jet-quenching parameter. We find that the effect of scalar charge is decreasing and rotation parameter is increasing the value of the jet-quenching parameter.

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STRING SCATTERING OFF THE (2 + 1)-DIMENSIONAL ROTATING BLACK HOLE

Modern Physics Letters A ◽

10.1142/s0217732396001466 ◽

1996 ◽

Vol 11 (18) ◽

pp. 1467-1473 ◽

Cited By ~ 7

Author(s):

MAKOTO NATSUUME ◽

NORISUKE SAKAI ◽

MASAMICHI SATO

Keyword(s):

Black Hole ◽

De Sitter Space ◽

Hawking Temperature ◽

Bogoliubov Transformation ◽

De Sitter ◽

Rotating Black Hole ◽

Black Hole Background ◽

Dimensional Black Hole

The SL (2, R)/Z WZW orbifold which describes the (2+1)-dimensional black hole approaching anti-de Sitter space asymptotically. We study the 1 → 1 tachyon scattering off the rotating black hole background and calculate the Hawking temperature using the Bogoliubov transformation.

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Greybody factor for a rotating black hole with quintessential energy

Progress of Theoretical and Experimental Physics ◽

10.1093/ptep/ptaa004 ◽

2020 ◽

Vol 2020 (3) ◽

Author(s):

M Sharif ◽

Qanitah Ama-Tul-Mughani

Keyword(s):

Black Hole ◽

Effective Potential ◽

State Parameter ◽

Scalar Fields ◽

Accelerated Expansion ◽

Massless Scalar ◽

Emission Rates ◽

Rotating Black Hole ◽

Klein Gordon ◽

Tortoise Coordinate

Abstract This paper is devoted to deriving an analytic expression of the greybody factor for a rotating black hole surrounded by quintessence. Primarily, we transform the radial part of the Klein–Gordon equation into the standard Schrödinger equation through the tortoise coordinate to analyze the profile of the effective potential. Asymptotic solutions are obtained in two distinct regions, namely, the black hole and cosmological horizons determined by the quintessential field. We then extrapolate these solutions and match them smoothly in an intermediate region to extend the viability over the whole radial regime. To elaborate the significance of the analytical solution, we evaluate the emission rates and absorption cross-section for the massless scalar fields. It is found that the accelerated expansion of the universe corresponding to smaller values of the state parameter minimizes the effective potential and consequently increases the emission process of the scalar field particles.

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HAWKING RADIATION FOR SCALAR AND DIRAC FIELDS IN FIVE-DIMENSIONAL DILATONIC BLACK HOLE VIA ANOMALIES

International Journal of Modern Physics D ◽

10.1142/s0218271812500307 ◽

2012 ◽

Vol 21 (03) ◽

pp. 1250030 ◽

Cited By ~ 1

Author(s):

RAMÓN BECAR ◽

P. A. GONZÁLEZ

Keyword(s):

Black Hole ◽

Gauge Invariance ◽

Scalar Fields ◽

Two Dimensional ◽

Massive Scalar ◽

Dimensional Theory ◽

Dirac Fields ◽

Black Hole Background ◽

Planck Distribution ◽

Dilatonic Black Hole

We study massive scalar fields and Dirac fields propagating in a five-dimensional dilatonic black hole background. We expose that for both fields the physics can be described by a two-dimensional theory, near the horizon. Then, in this limit, by applying the covariant anomalies method we find the Hawking flux by restoring the gauge invariance and the general coordinate covariance, which coincides with the flux obtained from integrating the Planck distribution for fermions.

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