Emission spectrum of soft massless states from heavy superstring

TL;DR

This paper calculates the emission spectrum of soft massless states from highly excited superstrings, revealing thermal distributions at the Hagedorn temperature and connections to black hole physics.

Contribution

It provides the first detailed calculation of emission rates and greybody factors for superstring states, linking string spectra to black hole thermodynamics.

Findings

Emission spectra follow thermal distributions at Hagedorn temperature

Greybody factors are computed and related to black hole emission

Results suggest a deep connection between superstring states and black hole physics

Abstract

We calculate emission rates of various bosonic/fermionic soft massless states of open/closed superstring from an ensemble of a highly excited open/closed superstring in the flat background. The resulting spectrum shows thermal distributions at the Hagedorn temperature. We find greybody factors for each process and observe their relation to the ones from blackholes.