On primary relations at tree-level in string theory and field theory

A bstract By the use of cyclic symmetry, KK relations and BCJ relations, one can reduce the number of independent N -point color-ordered tree amplitudes in gauge theory and string theory from N ! to ( N  − 3)!. In this paper, we investigate these relations at tree-level in both string theory and fie...

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Bibliographic Details
Published in:The journal of high energy physics 2012-02, Vol.2012 (2), Article 61
Main Authors: Ma, Qian, Du, Yi-Jian, Chen, Yi-Xin
Format: Article
Language:English
Subjects:
Amplitudes
Big Bang theory
Classical and Quantum Gravitation
Color
Elementary Particles
Field theory
Gauge theory
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Relativity Theory
String Theory
Symmetry
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Summary:A bstract By the use of cyclic symmetry, KK relations and BCJ relations, one can reduce the number of independent N -point color-ordered tree amplitudes in gauge theory and string theory from N ! to ( N  − 3)!. In this paper, we investigate these relations at tree-level in both string theory and field theory. We will show that there are two primary relations. All other relations can be generated by the primary relations. In string theory, the primary relations can be chosen as cyclic symmetry as well as either the fundamental KK relation or the fundamental BCJ relation. In field theory, the primary relations can only be chosen as cyclic symmetry and the fundamental BCJ relation. We will further show a kind of more general relation which can also be generated by the primary relations. The general formula of the explicit minimal-basis expansions for color-ordered open string tree amplitudes will be given and proven in this paper.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP02(2012)061