期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 9, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP09(2013)081
关键词
Scattering Amplitudes; Superstrings and Heterotic Strings; D-branes; Bosonic Strings
资金
- STFC [ST/J000469/1]
- MIUR (Italy) [2006020509 004, 2010YJ2NYW 006]
- NIKHEF (Amsterdam)
- 'Institut Lagrange de Paris'
- STFC [ST/J000469/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J000469/1, 977670] Funding Source: researchfish
We study the field theory limit of multi-loop (super) string amplitudes, with the aim of clarifying their relationship to Feynman diagrams describing the dynamics of the massless states. We propose an explicit map between string moduli around degeneration points and Schwinger proper-times characterizing individual Feynman diagram topologies. This makes it possible to identify the contribution of each light string state within the full string amplitude and to extract the field theory Feynman rules selected by (covariantly quantized) string theory. The connection between string and field theory amplitudes also provides a concrete tool to clarify ambiguities related to total derivatives over moduli space: in the superstring case, consistency with the field theory results selects a specific prescription for integrating over supermoduli. In this paper, as an example, we focus on open strings supported by parallel D-branes, and we present two-loop examples drawn from bosonic and RNS string theories, highlighting the common features between the two setups.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据