Hadronic string and chiral symmetry breaking

Details Hadronic string and chiral symmetry breaking Hadronic string and chiral symmetry breaking

2002-10-22

arxiv.org/abs/hep-th/0210210v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, Latex, Talk at 12th Seminar on High Energy Physics QUARKS'2002, Novgorod, Russia, June 1-7, 2002

Scientific paper

We assume that QCD can be effectively described with string-like variables. The hadronic string is built over the chirally non-invariant QCD vacuum by means of the boundary interaction with background chiral fields associated with pions. By making this interaction compatible with the conformal symmetry of the string and with the unitarity constraint on chiral fields we reconstruct the equations of motion for the latter ones and furthermore recover the Lagrangian of non-linear sigma model of pion interactions. The estimated chiral structural constants of Gasser and Leutwyler fit well the phenomenological values.

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