S-matrix for magnons in the D1-D5 system

Abstract

We show that integrability and symmetries of the near horizon geometry of the D1-D5 system determine the S-matrix for the scattering of magnons with polarizations in AdS3 $\times$ S3 completely up to a phase. Using semi-classical methods we evaluate the phase to the leading and to the one-loop approximation in the strong coupling expansion. We then show that the phase obeys the unitarity constraint implied by the crossing relations to the one-loop order. We also verify that the dispersion relation obeyed by these magnons is one-loop exact at strong coupling which is consistent with their BPS nature.

40 pages, Latex, Role of Virasoro constraints clarified, version matches with published version

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Cited by in corpus (3)

• Quantum corrections to spinning superstrings in AdS_3 x S^3 x M^4: determining the dressing phase
• Comment on Strings in AdS3 x S3 x S3 x S1 at One Loop
• On the massless modes of the AdS3/CFT2 integrable systems