Signatures of spinning evaporating micro black holes

Antonino Flachi, Misao Sasaki, Takahiro Tanaka

Research output: Contribution to conferencePaper

Abstract

We consider the evaporation of rotating micro black holes produced in highly energetic particle collisions, taking into account the polarization due to the coupling between the spin of the emitted particles and the angular momentum of the black hole. The effect of rotation shows up in the helicity dependent angular distribution significantly. By using this effect, there is a possibility to determine the axis of rotation for each black hole formed, suggesting a way to improve the statistics. Deviation from thermal spectrum is also a signature of rotation. This deviation is due to the fact that rapidly rotating holes have an effective temperature Teff significantly higher than the Hawking temperature TH. The deformation of the spectral shape becomes evident only for very rapidly rotating cases. We show that, since the spectrum follows a blackbody profile with an effective temperature, it is difficult to determine both the number of extradimensions and the rotation parameter from the energy spectrum alone. We argue that the helicity dependent angular distribution may provide a way to resolve this degeneracy. We illustrate the above results for the case of fermions.

Original languageEnglish
Publication statusPublished - 2008 Dec 1
Externally publishedYes
Event18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008 - Higashi-Hiroshima, Japan
Duration: 2008 Nov 172008 Nov 21

Other

Other18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008
CountryJapan
CityHigashi-Hiroshima
Period08/11/1708/11/21

    Fingerprint

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Flachi, A., Sasaki, M., & Tanaka, T. (2008). Signatures of spinning evaporating micro black holes. Paper presented at 18th Workshop on General Relativity and Gravitation in Japan, JGRG 2008, Higashi-Hiroshima, Japan.