Classical Stringy Black Holes Modify the Thermal Spectrum

TL;DR

This paper demonstrates that stringy corrections to black holes alter their thermal properties, invalidating the standard thermodynamic interpretation and showing non-thermal particle spectra in modified backgrounds.

Contribution

It reveals how alpha prime corrections fundamentally change black hole thermodynamics and particle spectra, challenging traditional interpretations.

Findings

Temperatures differ in corrected black holes

Particle spectra become non-thermal due to stringy effects

Non-perturbative regimes suppress particle number density

Abstract

Non-local (alpha prime) corrections to Schwarzschild black holes are shown to invalidate the thermodynamical interpretation of black holes. In particular, the canonical and Bekenstein-Hawking temperatures are not equal. The particle number density of fields quantized in the (alpha prime modified) black hole background is no longer thermal. In the non-perturbative region (alpha prime going to infinity or mass going to zero), an analytic continuation to the number density is shown to vanish exponentially.