A toy black hole S-matrix in the D1-D5 CFT

Understand

To model the process of absorption and emission of quanta by an extremal D1-D5 black hole in the dual CFT, we consider transitions between different Ramond vacua via absorption and emission of chiral primaries.

• We compute the probabilities to reach different CFT states starting with a special Ramond vacuum, using techniques of the orbifold CFT.
• It is found that the processes involving the change of angular momentum by $k$ units are suppressed as 1/N^k