论文标题
KK5-branes的测量线性Sigma模型的定位
Localization of Gauged Linear Sigma Model for KK5-branes
论文作者
论文摘要
我们研究了非线性Sigma模型的目标空间的量子方面,该模型是测量线性Sigma模型(GLSM)的低能量有效理论。因此,我们特别尤其计算GLSM的精确球分区函数,用于KK $ 5 $ BRANES,其背景几何形状是陶布坚固的空间,使用库仑分支上的超对称性定位技术。 从球形分区功能中,我们提炼世界插入式效果。特别是,我们表明,关于单一中心的陶布 - 纽特空间,只有在taub-nut空间中$ s^1 $纤维的渐近半径为零时,就存在Instanton贡献。
We study quantum aspects of the target space of the non-linear sigma model which is a low-energy effective theory of the gauged linear sigma model (GLSM). As such, we especially compute the exact sphere partition function of GLSM for KK$5$-branes whose background geometry is a Taub-NUT space, using the supersymmetric localization technique on the Coulomb branch. From the sphere partition function, we distill the world-sheet instanton effects. In particular, we show that concerning the single-centered Taub-NUT space, the instanton contributions exist only if the asymptotic radius of the $S^1$ fiber in the Taub-NUT space is zero.