One-loop QCD spin chain and its spectrum
Artikel i vetenskaplig tidskrift, 2005

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.

Spin chain

Anomalous dimension

Gauge theory

Yang Mills



Niklas Beisert

Princeton University


Kavli Institute for Theoretical Physics

Gabriele Ferretti

Göteborgs universitet

Chalmers, Institutionen för teoretisk fysik och mekanik, Matematisk fysik

Rainer Heise

Göteborgs universitet

Kostantin Zarembo

Alikhanov Institute for Theoretical and Experimental Physics

Uppsala universitet

Nuclear Physics B

0550-3213 (ISSN)

Vol. 717 1-2 137-189





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