Pair Production of small Black Holes in Heterotic String Theories

Understand

We study pair production of small BPS BH's in heterotic strings compactified on tori and in the FHSV model.

• After recalling the identification of small BH's in the perturbative BPS spectrum, we compute the tree-level amplitudes for processes initiated by massless vector bosons or gravitons.
• We then analyze the resulting cross sections in terms of energy and angular distributions.
• Finally, we briefly comment on scenari with large extra dimensions and on generalizations of our results to non-BPS, non-extremal and rotating BH's.