Confining strings with topological term
Abstract
We consider several aspects of `confining strings', recently proposed to describe the confining phase of gauge field theories. We perform the exact duality transformation that leads to the confining string action and show that it reduces to the Polyakov action in the semiclassical approximation. In 4D we introduce a `θterm' and compute the lowenergy effective action for the confining string in a derivative expansion. We find that the coefficient of the extrinsic curvature (stiffness) is negative, confirming previous proposals. In the absence of a θterm, the effective string action is only a cutoff theory for finite values of the coupling e, whereas for generic values of θ, the action can be renormalized and to leading order we obtain the NambuGoto action plus a topological `spin' term that could stabilize the system.
 Publication:

Physics Letters B
 Pub Date:
 February 1997
 DOI:
 10.1016/S03702693(97)001329
 arXiv:
 arXiv:hepth/9612103
 Bibcode:
 1997PhLB..396..115D
 Keywords:

 High Energy Physics  Theory
 EPrint:
 11 pages, harvmac