On small black holes, KK monopoles and solitonic 5-branes

Understand

We review and extend results on higher-curvature corrections to different configurations describing a superposition of heterotic strings, KK monopoles, solitonic 5-branes and momentum waves.

• Depending on which sources are present, the low-energy fields describe a black hole, a soliton or a naked singularity.
• We show that this property is unaltered when perturbative higher-curvature corrections are included, provided the sources are fixed.
• On the other hand, this character may be changed by appropriate introduction (or removal) of sources regardless of the presence of curvature corrections, which constitutes a non-perturbative modification of the departing system.