More on one-loop massless amplitudes of superstring theories.

More on one-loop massless amplitudes of superstring theories.
复制标题

DOI:
10.1103/physrevd.39.1626
复制
发表时间:
1989-03
期刊:
Physical review. D, Particles and fields
影响因子:
--
通讯作者:
Tsuchiya
Tsuchiya
中科院分区:
其他
文献类型:
--
作者:
Tsuchiya

文献摘要

被引文献

相似文献

本文研究了一种系统的方法来显式计算M>4外部无质量玻色子的单圈超弦振幅。特别是,我们给出了一个算法,以获得各种新的θ函数的身份,这是有用的直接求和的自旋结构的无质量振幅。这些恒等式使得I型理论的高点振幅中的蝌蚪发散的抵消机制的有效性变得非常透明。
A systematic way of explicitly evaluating one-loop superstring amplitudes with M>4 external massless bosons is studied. In particular, we give an algorithm to derive various new theta-function identities which are useful for directly summing over spin structures of massless amplitudes. These identities make the validity of the cancellation mechanism of the dilaton tadpole divergence in higher-point amplitudes of type-I theory very transparent.