arXiv 0905.16232009-05hep-th

F1-NS5-branes的超对称形变及其精确CFT描述

Supersymmetric deformations of F1-NS5-branes and their exact CFT description

P. Marios Petropoulos, Nikolaos Prezas, Konstadinos Sfetsos

备注：: 30+1 pages, 1 table; v2 minor changes, version to appear in JHEP
发表信息：: JHEP 0909:085,2009
DOI：: 10.1088/1126-6708/2009/09/085

摘要：

我们考虑精确共形场论SL（2，R）x SU（2）x U（1）^4中的某些类算子，它们描述了由Neveu-Schwarz 3-form流支持的AdS（3）x S（3）x T4几何中的弦。这个背景出现在一个包裹在4-torus上的NS 5-膜和涂抹在4-torus上的F1-膜的系统的近视界极限中，当这两种类型的膜位于它们共同的横向空间中的同一点时。我们发现了一类导致时空超对称形变的算子。值得注意的是，这些算子中的大多数不是关于wordsheet上的N=2超共形代数的手征准素算子。这些世界片共形场论变形的一个子集可以解释为膜系统的几何变形，也可以解释为F1-膜分布的变形，被视为包裹的NS 5-膜世界体积内的光滑瞬子。二维共形场论，然而，似乎缺乏运营商对应的任意NS 5膜变形，在纯NS 5膜系统中，所有的几何变形可以占手征初级运营商。

英文摘要：

We consider certain classes of operators in the exact conformal field theory SL(2,R) x SU(2) x U(1)^4 describing strings in an AdS(3) x S(3) x T4 geometry supported by Neveu--Schwarz 3-form fluxes. This background arises in the near-horizon limit of a system of NS5-branes wrapped on a 4-torus and F1-branes smeared on the 4-torus when both types of branes are located at the same point in their common transverse space. We find a class of operators that lead to spacetime supersymmetric deformations. It is remarkable that most of these operators are not chiral primary with respect to the N=2 superconformal algebra on the wordsheet. A subset of these worldsheet conformal field theory deformations admits an interpretation either as a geometric deformation of the brane system or as a deformation of the distribution of the F1-branes, viewed as smooth instantons, inside the wrapped NS5-brane worldvolume. The 2-dimensional conformal field theory, however, seems to lack operators corresponding to arbitrary NS5-brane deformations, in contrast to pure NS5-brane systems where all geometric deformations can be accounted for by chiral primary operators.

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英文摘要：

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