几种典型背景中Green-Schwarz超弦的κ-对称性

The κ-symmetry of Green-Schwarz superstringin some typical background

Metsaev和Tseytlin(MT)给出的AdS5S5背景中Green-Schwarz(GS)IIB超弦的Polyakov作用量可以写成等价的Nambu-Goto形式.对于这种形式,给出了新的与靶空间的流有关的投影算子,并用其构造了使作用量不变的局域κ-变换.κ-对称性的这种新方案是由Schwarz对于GS模型提出的.由于MT模型与GS模型有所不同,文中所构造的局域κ-变换有一些新的特点,且适用于其他类似于MT模型的系统.文中分别以AdS5S1背景中IIB弦及Polyakov新提出的模型为例,构造了κ-对称性的靶空间形式.

The action of type IIB superstring in AdS5×ОS^5 background given by Metsacv and Tseytlin（MT） can be reformulated in the Nambu-Goto form. For this form we give the new projection operator involving vielbeins in the target space to con-struct local to-transformations which leave the action invariant. This new formulation of to-symmetry（called target space form）is first suggested by Schwarz for the Green-Schwarz（GS） model. Due to the difference between GS model and MT model, our con- struction has some new aspects, which is applicable to all models similar to the MT model. An example is given for the AdS5 ×О S^1 IIB superstring. We also study the κ-symmetry in target space form for the Polyakov model.