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arxiv: 1107.2660 · v2 · pith:TCTC4F7Lnew · submitted 2011-07-13 · ✦ hep-th

The massless string spectrum on AdS₃ x S³ from the supergroup

Matthias R. Gaberdiel , Sebastian Gerigk This is my paper
classification ✦ hep-th
keywords stringmasslessspectrumsupergroupanswerbackgroundbrst-cohomologycorresponding
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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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