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One-Loop QCD Spin Chain and its Spectrum
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Theoretical Physics. Department of Physics and Materials Science, Theoretical Physics.
2005 (Swedish)In: Nuclear Physics B, Vol. 717, 137-189 p.Article in journal (Refereed) Published
Abstract [en]

We study the renormalization of gauge invariant operators in large Nc QCD. We compute the complete matrix of anomalous dimensions to leading order in the 't Hooft coupling and study its eigenvalues. Thinking of the mixing matrix as the Hamiltonian of a generalized spin chain we find a large integrable sector consisting of purely gluonic operators constructed with self-dual field strengths and an arbitrary number of derivatives. This sector contains the true ground state of the spin chain and all the gapless excitations above it. The ground state is essentially the anti-ferromagnetic ground state of a XXX1 spin chain and the excitations carry either a chiral spin quantum number with relativistic dispersion relation or an anti-chiral one with non-relativistic dispersion relation.

Place, publisher, year, edition, pages
2005. Vol. 717, 137-189 p.
Identifiers
URN: urn:nbn:se:uu:diva-79437DOI: doi:10.1016/j.nuclphysb.2005.04.004OAI: oai:DiVA.org:uu-79437DiVA: diva2:107350
Available from: 2006-04-10 Created: 2006-04-10 Last updated: 2011-01-11

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Zarembo, Konstantin

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