On the Heterotic Effective Action at One-Loop, Gauge Couplings and the Gravitational Sector
On the Heterotic Effective Action at One-Loop, Gauge Couplings and the Gravitational Sector
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论单环、规矩联轴器和引力扇区的异质有效作用
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
J. Rizos
中科院分区：
文献类型：
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作者：
E. Kiritsis;C. Kounnas;M. Petropoulos;J. Rizos
我们详细介绍了计算杂种优势单环有效作用的过程。我们专注于重力和仪表联轴器。我们证明，当基态超对称时，引力扇区的二阶导数耦合不会在一个环路中重整化。提出了这个非重整化定理对于微扰理论中的所有阶都成立的论点。我们还导出了对仪表耦合的完整单环修正。对于一类 $N=2$ 基态，即通过环形压缩到通用六维 $N=1$ 模型的四个维度获得的基态，我们给出了规范组独立阈值的显式公式，并表明它们在整个系列中是相等的。
We present in detail the procedure for calculating the heterotic one-loop effective action. We focus on gravitational and gauge couplings. We show that the two-derivative couplings of the gravitational sector are not renormalized at one loop when the ground state is supersymmetric. Arguments are presented that this non-renormalization theorem persists to all orders in perturbation theory. We also derive the full one-loop correction to the gauge coupling. For a class of $N=2$ ground states, namely those that are obtained by toroidal compactification to four dimensions of generic six-dimensional $N=1$ models, we give an explicit formula for the gauge-group independent thresholds, and show that these are equal within the whole family.