Hawking Radiation from Squashed Kaluza-Klein Black Holes -- A Window to Extra Dimensions --

TL;DR

This paper investigates how Hawking radiation from squashed Kaluza-Klein black holes can reveal the size of extra dimensions, suggesting a potential observational window into higher-dimensional spacetime.

Contribution

It demonstrates that Hawking radiation luminosity from these black holes encodes information about the extra dimension's size, linking black hole physics to extra-dimensional geometry.

Findings

Hawking radiation luminosity depends on the size of the extra dimension.

Scalar field emission reflects the 5-dimensional structure of the black hole.

Horizon squashing affects the Hawking radiation spectrum.

Abstract

We explore the obsevability of extra dimensions through 5-dimensional squashed Kaluza-Klein black holes residing in the Kaluza-Klein spacetime. With the expectation that the Hawking radiation reflects the 5-dimensional nature of the squashed horizon, we study the Hawking radiation of a scalar field in the squashed black hole background. As a result, we show that the luminosity of Hawking radiation tells us the size of the extra dimension, namely, the squashed Kaluza-Klein black holes open a window to extra dimensions.