Aspects of duality and confining strings

Mauri Miettinen, Antti J. Niemi, Yuri Stroganov
2000 Physics Letters B  
We inspect the excitation energy spectrum of a confining string in terms of solitons in an effective field theory model. The spectrum can be characterized by a spectral function, and twisting and bending of the string is manifested by the invariance of this function under a duality transformation. Both general considerations and numerical simulations reveal that the spectral function can be approximated by a simple rational form, which we propose becomes exact in the Yang-Mills theory.
doi:10.1016/s0370-2693(99)01479-3 fatcat:wxqmep4smvbvhbmx7o2ndjuvey