Comments on world-sheet form factors in AdS/CFT
2014 (English)In: Journal of Physics A: Mathematical and Theoretical, ISSN 1751-8113, Vol. 47, no 5, 055401- p.Article in journal (Refereed) Published
We study form factors in the light-cone gauge world-sheet theory for strings in AdS(5) x S-5. We perturbatively calculate the two-particle form factor in a closed su(2) sector to one-loop in the near-plane-wave limit and to two-loops in the Maldacena-Swanson limit. We also perturbatively solve the functional equation which follows from the form factor axioms for the world-sheet theory and show that the 'minimal' solution correctly reproduces the discontinuities of the perturbative calculations. Finally we propose a prescription, valid for polynomial orders of the inverse world-sheet length, for extracting the finite-volume world-sheet matrix element from the form factors and show that the two-excitation matrix element matches with the thermodynamic limit of the spin-chain description of certain tree-level N = 4 SYM structure constants.
Place, publisher, year, edition, pages
2014. Vol. 47, no 5, 055401- p.
AdS/CFT, form factors, gauge/string duality, scattering matrix, quantum field theory
IdentifiersURN: urn:nbn:se:uu:diva-219187DOI: 10.1088/1751-8113/47/5/055401ISI: 000330216300011OAI: oai:DiVA.org:uu-219187DiVA: diva2:699001