Equivalence of two-loop superstring amplitudes in the pure spinor and Ramond-Neveu-Schwarz formalisms

被引：90
作者：
Berkovits, N
Mafra, CR
机构：
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 01期
基金：
巴西圣保罗研究基金会;
关键词：
D O I：
10.1103/PhysRevLett.96.011602
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The pure spinor formalism for the superstring has recently been used to compute massless four-point two-loop amplitudes in a manifestly super-Poincare covariant manner. In this Letter, we show that when all four external states are Neveu-Schwarz states, the two-loop amplitude coincides with the Ramond-Neveu-Schwarz result.
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