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  On form factors in N=4 sym

Bork, L. V., Kazakov, D. I., & Vartanov, G. S. (2011). On form factors in N=4 sym. Journal of High Energy Physics, 2011(2): 063. doi:10.1007/JHEP02(2011)063.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-D160-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-D162-2
Genre: Journal Article

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1011.2440 (Preprint), 450KB
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 Creators:
Bork, L. V., Author
Kazakov, D. I., Author
Vartanov, G. S.1, Author              
Affiliations:
1Quantum Gravity and Unified Theories, AEI Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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Free keywords: High Energy Physics - Theory, hep-th
 Abstract: In this paper we study the form factors for the half-BPS operators $\mathcal{O}^{(n)}_I$ and the $\mathcal{N}=4$ stress tensor supermultiplet current $W^{AB}$ up to the second order of perturbation theory and for the Konishi operator $\mathcal{K}$ at first order of perturbation theory in $\mathcal{N}=4$ SYM theory at weak coupling. For all the objects we observe the exponentiation of the IR divergences with two anomalous dimensions: the cusp anomalous dimension and the collinear anomalous dimension. For the IR finite parts we obtain a similar situation as for the gluon scattering amplitudes, namely, apart from the case of $W^{AB}$ and $\mathcal{K}$ the finite part has some remainder function which we calculate up to the second order. It involves the generalized Goncharov polylogarithms of several variables. All the answers are expressed through the integrals related to the dual conformal invariant ones which might be a signal of integrable structure standing behind the form factors.

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 Dates: 2010-11-102010-11-242011
 Publication Status: Published in print
 Pages: 35 pages, 7 figures, LATEX2e
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1011.2440
URI: http://arxiv.org/abs/1011.2440
DOI: 10.1007/JHEP02(2011)063
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Title: Journal of High Energy Physics
Source Genre: Journal
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Publ. Info: Bologna, Italy : Società italiana di fisica
Pages: - Volume / Issue: 2011 (2) Sequence Number: 063 Start / End Page: - Identifier: ISSN: 1126-6708
CoNE: https://pure.mpg.de/cone/journals/resource/111021927548002_1