Towards a Theory of the QCD String


Dubovsky, S. (2015). Towards a Theory of the QCD String. Perimeter Institute. https://pirsa.org/15120021


Dubovsky, Sergei. Towards a Theory of the QCD String. Perimeter Institute, Dec. 11, 2015, https://pirsa.org/15120021


          @misc{ pirsa_PIRSA:15120021,
            doi = {10.48660/15120021},
            url = {https://pirsa.org/15120021},
            author = {Dubovsky, Sergei},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {Towards a Theory of the QCD String},
            publisher = {Perimeter Institute},
            year = {2015},
            month = {dec},
            note = {PIRSA:15120021 see, \url{https://pirsa.org}}

Sergei Dubovsky New York University (NYU)


We construct a new model of four-dimensional relativistic strings with integrable dynamics on the worldsheet. In addition to translational modes this model contains a single massless pseudoscalar worldsheet field - the worldsheet axion. The axion couples to a topological density which counts the self-intersection number of a string. The corresponding coupling is fixed by integrability to Q=716π−−−√≈0.37. We argue that this model is a member of a larger family of relativistic non-critical integrable string models. This family includes and extends conventional non-critical strings described by the linear dilaton CFT. Intriguingly, recent lattice data in SU(3) and SU(5) gluodynamics reveals the presence of a massive pseudoscalar axion on the worldsheet of confining flux tubes. The value of the corresponding coupling, as determined from the lattice data, is equal to QL≈0.38±0.04.