QCD Strings as Constrained Grassmannian Sigma Model:

Details QCD Strings as Constrained Grassmannian Sigma Model: QCD Strings as Constrained Grassmannian Sigma Model:

1994-10-24

arxiv.org/abs/hep-lat/9410017v1

Phys.Rev. D51 (1995) 5830-5838

Physics

High Energy Physics

High Energy Physics - Lattice

22 pages, Preprint: SFU HEP-116-94

Scientific paper

10.1103/PhysRevD.51.5830

We present calculations for the effective action of string world sheet in R3 and R4 utilizing its correspondence with the constrained Grassmannian sigma model. Minimal surfaces describe the dynamics of open strings while harmonic surfaces describe that of closed strings. The one-loop effective action for these are calculated with instanton and anti-instanton background, reprsenting N-string interactions at the tree level. The effective action is found to be the partition function of a classical modified Coulomb gas in the confining phase, with a dynamically generated mass gap.

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