The massless string spectrum on AdS_3 x S^3 from the supergroup

Details The massless string spectrum on AdS_3 x S^3 from the supergroup The massless string spectrum on AdS_3 x S^3 from the supergroup

2011-07-13

arxiv.org/abs/1107.2660v2

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, 9 figures, LaTeX, v2: section 3.1 extended, reference added

Scientific paper

String theory on AdS_3 x S^3 is studied in the hybrid formulation. We give a detailed description of the PSL(2|2) supergroup WZW model that underlies the background with pure NS-NS flux, and determine the BRST-cohomology corresponding to the massless string states. The resulting spectrum is shown to match exactly with the expected supergravity answer, including the sectors with small KK momentum on the sphere.

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