Four dimensional ambitwistor strings and form factors of local and Wilson line operatorsстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 6 декабря 2018 г.
Аннотация:We consider the description of form factors of local and Wilson line operators (Reggeon amplitudes) in N=4 Supersymmetric Yang-Mills theory within the framework of four-dimensional ambitwistor string theory. We present the explicit expressions for string composite operators corresponding to stress-tensor operator supermultiplet and Wilson line operator insertion. It is shown that corresponding tree level string correlation functions correctly reproduce previously obtained Grassmannian integral representations. As a by-product we derive four-dimensional tree-level scattering equation representations for the mentioned form factors and formulate a simple gluing procedure used to relate operator form factors with on-shell amplitudes.