IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
Worldsheet four-point functions In AdS3/CFT2
Autor/es:
CARLOS CARDONA, INGO KIRSH
Revista:
JOURNAL OF HIGH ENERGY PHYSICS - (Online)
Editorial:
Springer
Referencias:
Lugar: Trieste; Año: 2011 vol. 1107 p. 1 - 33
ISSN:
1029-8479
Resumen:
We calculate some extremal and non-extremal four-point functions on the sphere of certain chiral primary operators for strings on AdS 3 × S 3 × T 4. The computation is done for small values of the spacetime cross-ratio where global SL(2) and SU(2) descendants may be neglected in the intermediate channel. Ignoring also current algebra descendants, we find that in the non-extremal case the integrated worldsheet correlators factorize into spacetime three-point functions, which is non-trivial due to the integration over the moduli space. We then restrict to the extremal case and compare our results with the four-point correlators recently computed in the dual boundary theory. We also discuss a particular non-extremal correlator involving two chiral and two anti-chiral operators.