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

作　　者：王展云[1] 王晓辉[2] 石康杰[2] 岳瑞宏[2] 

机构地区：[1]西安邮电学院电子与信息工程系,西安710121 [2]西北大学现代物理研究所,西安710069

出　　处：《物理学报》2007年第2期755-763,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10575080)资助的课题~~

摘　　要：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.

关 键 词：Green-Sehwarz超弦 κ-对称性 AdS5×ОS^5 AdS5×ОS^1 

分 类 号：O412[理学—理论物理]