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  Integrability and transcendentality

Eden, B. U., & Staudacher, M. (2006). Integrability and transcendentality. Journal of Statistical Mechanics: Theory and Experiment, P11014.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4A62-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4A63-E
Genre: Journal Article

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jstat6_11_p11014.pdf (Publisher version), 927KB
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 Creators:
Eden, Burkhard U.1, Author
Staudacher, Matthias1, Author              
Affiliations:
1Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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 Abstract: We derive the two-loop Bethe ansatz for the \mathfrak {sl}(2) twist operator sector of {\cal N}=4 gauge theory directly from the field theory. We then analyse a recently proposed perturbative asymptotic all-loop Bethe ansatz in the limit of large spacetime spin at large but finite twist, and find a novel all-loop scaling function. This function obeys the Kotikov–Lipatov transcendentality principle and does not depend on the twist. Under the assumption that one may extrapolate back to leading twist, our result yields an all-loop prediction for the large spin anomalous dimensions of twist 2 operators. The latter also appears as an undetermined function in a recent conjecture of Bern, Dixon and Smirnov for the all-loop structure of the maximally helicity violating n-point gluon amplitudes of {\cal N}=4 gauge theory. This potentially establishes a direct link between the worldsheet and the spacetime S matrix approach. A further assumption for the validity of our prediction is that perturbative BMN (Berenstein–Maldacena–Nastase) scaling does not break down at four-loop level or beyond. We also discuss how the result gets modified if BMN scaling does break down. Finally, we show that our result qualitatively agrees at strong coupling with a prediction of string theory.

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Language(s): eng - English
 Dates: 2006-11
 Publication Status: Published in print
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 Identifiers: eDoc: 298069
ISI: 000243165200016
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Title: Journal of Statistical Mechanics: Theory and Experiment
  Alternative Title : J. Stat. Mech.-Theory Exp.
Source Genre: Journal
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Pages: - Volume / Issue: - Sequence Number: P11014 Start / End Page: - Identifier: ISSN: 1742-5468