Year: 2017
Type: article
Abstract: In this paper, we continue our study of form factors and correlation functions of gauge-invariant local composite operators in the twistor-space formulation of $$ \mathcal{N}=4 $$ super Yang-Mills theory. Using the vertices for these operators obtained in our recent papers [1, 2], we show how to calculate the twistor-space diagrams for general N k MHV form factors via the inverse soft limit, in analogy to the amplitude case. For general operators without α indices, we then reexpress the NMHV form factors from the position-twistor calculation in terms of momentum twistors, deriving and expanding on a relation between the two twistor formalisms previously observed in the case of amplitudes. Furthermore, we discuss the calculation of generalized form factors and correlation functions as well as the extension to loop level, in particular providing an argument promised in [3].
Source: Journal of High Energy Physics
Authors: Laura Koster, Vladimir Mitev, Matthias Staudacher, Matthias Wilhelm
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2560487359