非阿贝尔Born-Infeld Action和I型杂优对偶（II）：非重整化定理
Non-Abelian Born-Infeld Action and Type I - Heterotic Duality (II): Nonrenormalization Theorems
摘要：
D=10中的I型杂化对偶预言了两边不同弦环水平上高阶F^n耦合的各种关系和约束。我们证明了对杂种F^4项的双环修正的消失，这是这种对偶性的基本预言之一。此外，我们还证明了杂种F^5和（CP偶）F^6耦合在一个环上没有重整化。这些结果加强了D=10时Tr F^（2n）偶合只出现在Ⅰ型圆盘树水平和杂种优势（n-1）环水平的猜想。我们的非重整化定理在任何具有16个超荷的杂化弦真空中都成立。
英文摘要：
Type I - heterotic duality in D=10 predicts various relations and constraints on higher order F^n couplings at different string loop levels on both sides. We prove the vanishing of two-loop corrections to the heterotic F^4 terms, which is one of the basic predictions from this duality. Furthermore, we show that the heterotic F^5 and (CP even) F^6 couplings are not renormalized at one loop. These results strengthen the conjecture that in D=10 any Tr F^(2n) coupling appears only at the disc tree-level on type I side and at (n-1)-loop level on the heterotic side. Our non-renormalization theorems are valid in any heterotic string vacuum with sixteen supercharges.
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