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arXiv 1402.6356hep-thmath-phmath.MP
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目标空间中的弦论

String theory in target space

Rutger H. Boels, Tobias Hansen

摘要:

我们认为,在平坦背景下,树水平上的弦论的完整S-矩阵可以从一个小的目标空间属性集合中获得,而无需求助于世界面描述。主要的非标准输入是(广义的)Britto-Cachazo-Feng-Witten位移,以及开放弦论的单值关系和封闭弦论的Kawai-Lewellen-Tye关系。散射振幅的根源,特别是它们在运动学极点的残留物中的出现,是这个故事的核心。这些残基通过在壳递归关系确定振幅。几个检查的形式主义,包括计算的Koba-Nielsen振幅的玻色弦。进一步研究了目标空间的么正性问题。对于Veneziano振幅这个问题是减少庞加莱不变性,酉性和局部性的积极性的一个特定的数值和。有趣的是,这种分析产生了无鬼定理的主要条件,从这个振幅的前三个极点的尺寸和截距。

英文摘要:

It is argued that the complete S-matrix of string theory at tree level in a flat background can be obtained from a small set of target space properties, without recourse to the worldsheet description. The main non-standard inputs are (generalised) Britto-Cachazo-Feng-Witten shifts, as well as the monodromy relations for open string theory and the Kawai-Lewellen-Tye relations for closed string theory. The roots of the scattering amplitudes and especially their appearance in the residues at the kinematic poles are central to the story. These residues determine the amplitudes through on-shell recursion relations. Several checks of the formalism are presented, including a computation of the Koba-Nielsen amplitude in the bosonic string. Furthermore the question of target space unitarity is (re-)investigated. For the Veneziano amplitude this question is reduced by Poincare invariance, unitarity and locality to that of positivity of a particular numerical sum. Interestingly, this analysis produces the main conditions of the no-ghost theorem on dimension and intercept from the first three poles of this amplitude.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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