Correlation functions of local composite operators from generalized unitarity

A bstract We describe the use of generalized unitarity for the construction of correlation functions of local gauge-invariant operators in general quantum field theories and illustrate this method with several calculations in = 4 super-Yang-Mills theory involving BPS and non-BPS operators. Form fact...

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Published in:The journal of high energy physics 2013-03, Vol.2013 (3), p.1-63, Article 172
Main Authors: Engelund, Oluf Tang, Roiban, Radu
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Construction
Correlation
Elementary Particles
Energy flow
Gravitational fields
High energy physics
Mathematical analysis
Operators
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Relativity Theory
String Theory
Symmetry
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description A bstract We describe the use of generalized unitarity for the construction of correlation functions of local gauge-invariant operators in general quantum field theories and illustrate this method with several calculations in = 4 super-Yang-Mills theory involving BPS and non-BPS operators. Form factors of gauge-invariant operators and their multi-operator generalization play an important role in our construction. We discuss various symmetries of the momentum space presentation of correlation functions, which is natural in this framework and give examples involving non-BPS and any number of BPS operators. We also discuss the calculation of correlators describing the energy flow in scattering processes as well as the construction of the effective action of a background gravitational field.
doi_str_mv 10.1007/JHEP03(2013)172
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subjects Classical and Quantum Gravitation
Construction
Correlation
Elementary Particles
Energy flow
Gravitational fields
High energy physics
Mathematical analysis
Operators
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Relativity Theory
String Theory
Symmetry
title Correlation functions of local composite operators from generalized unitarity
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