Towards the QCD String: 2+1 dimensional Yang-Mills theory in the planar limit

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dc.creatorLeigh, Robert G.
dc.creatorMinic, Djordje
dc.date2004-07-07
dc.date2004-08-24
dc.date.accessioned2026-07-07T04:17:08Z
dc.date.available2026-07-07T04:17:08Z
dc.descriptionWe study the large N (planar) limit of pure SU(N) 2+1 dimensional Yang-Mills theory (YM_{2+1}) using a gauge-invariant matrix parameterization introduced by Karabali and Nair. This formulation crucially relies on the properties of local holomorphic gauge invariant collective fields in the Hamiltonian formulation of YM_{2+1}. We show that the spectrum in the planar limit of this theory can be explicitly determined in the $N=\infty$, low momentum (large 't Hooft coupling) limit, using the technology of the Eguchi-Kawai reduction and the existing knowledge concerning the one-matrix model. The dispersion relation describing the planar YM_{2+1} spectrum reads as $ω(\vec{k}) = \sqrt{\vec{k}^2 + m_n^2}$, where $n=1,2,...$ and $m_n = n m_r$, where $m_r$ denotes the renormalized mass, the bare mass m being determined by the planar 't Hooft coupling $g_{YM}^2 N$ via $m= \frac{g_{YM}^2 N}{2 π}$. The planar, low momentum limit, also captures the expected short and long distance physics of YM_{2+1} and gives an interesting new picture of confinement. The computation of the spectrum is possible due to a reduction of the YM_{2+1} Hamiltonian for the large 't Hooft coupling to the {\it singlet} sector of an effective one matrix model. The crucial observation is that the correct vacuum (the large N master field), consistent with the area law and the existence of a mass gap, is described by an effective quadratic matrix model, in the large N, large 't Hooft coupling limit.
dc.description18 pages, LaTeX; discussion of QCD string expanded and references added
dc.identifierhttps://arxiv.org/abs/hep-th/0407051
dc.identifierhttp://arxiv.org/abs/hep-th/0407051
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/52636
dc.subjectHigh Energy Physics - Theory
dc.titleTowards the QCD String: 2+1 dimensional Yang-Mills theory in the planar limit
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