study of nonperturbative aspects of superstring theory using string field theory

使用弦场理论研究超弦理论的非微扰方面

• 批准号: 23540332
• 负责人: MURAKAMI Koichi
• 金额: $ 3.24万
• 依托单位: Okayama Institute for Quantum Physics
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23540332/
• 关键词: 素粒子論; 超弦理論; 場の理論; 素粒子論的宇宙論; 弦理論

The purpose of this research is to overcome the ``contact term problem", which is a divergence problem possessed by superstring field theory and has been an obstacle to the formulation of the theory for a long time. We proposed a novel regularization scheme in which the number of space-time dimensions are shifted to a sufficiently large negative value. We verified our regularization mainly in the context of the light-cone gauge superstring field theory in the NSR formalism. We have shown that our regularization works well at least for the tree-level amplitudes. We have made a progress also in the analysis of the multiloop amplitudes.In addition to these analyses, we have pursued a new formulation of string field theory in which the string worldsheet is discritized. We also have studied cosmology particularly including quantum effects and back-reaction of matter fields.

本研究的目的是克服“接触项问题”，这是超弦场论所具有的发散问题，长期以来一直是理论制定的障碍。我们提出了一种新的正则化方案，其中时空维数被移动到一个足够大的负值。我们验证了我们的正则化主要是在光锥规范超弦场论的NSR形式。我们已经表明，我们的正则化工作良好，至少对树级振幅。我们在多圈振幅的分析方面也取得了进展，除了这些分析之外，我们还提出了一种新的弦场论公式，其中描述了弦世界单。我们还研究了宇宙学，特别是包括量子效应和物质场的反作用。

项目成果

Light-cone Gauge String Field Theory and Dimensional Regularization

光锥规范弦场理论与维数正则化

• DOI: 10.1143/ptps.188.9
• 发表时间: 2011
• 期刊: Progress of Theoretical Physics Supplement
• 作者: Nobuyuki Ishibashi;Koichi Murakami
• 通讯作者: Koichi Murakami

Spacetime fermions in light-cone gauge superstring field theory and dimensional regularization

光锥规范超弦场论中的时空费米子和维度正则化

• 发表时间: 2011
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: 石橋延幸;村上公一
• 通讯作者: 村上公一

Multiloop amplitudes of light-cone gauge bosonic string field theory in noncritical dimensions

非临界尺寸下光锥规玻色弦场理论的多环振幅

• 发表时间: 2011
• 作者: T. Maruyama;N. Yasutake;M. Okamoto;T. Tatsumi;郡和範;村上公一
• 通讯作者: 村上公一

Amplitudes in Noncritical Dimensions and Dimensional Regularization

非关键维度的振幅和维度正则化

• DOI: 10.1143/ptps.188.19
• 发表时间: 2011
• 期刊: Progress of Theoretical Physics Supplement
• 作者: K.Murakami;N.Ishibashi
• 通讯作者: N.Ishibashi

Multiloop amplitudes of light-cone gauge bosonic string field theory and noncritical dimensions

光锥规玻色弦场理论和非临界尺寸的多环振幅

• 发表时间: 2011
• 作者: 祖谷元;丸山敏毅;巽敏隆;Hiroshi Suzuki;青木一;村上公一
• 通讯作者: 村上公一