Restoration of chiral and U(1)_A symmetries in excited hadrons in the semiclassical regime
classification
✦ hep-ph
hep-lathep-thnucl-th
keywords
chiralrestorationsymmetriesexcitedhadronssemiclassicaldemonstratesdimensions
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Restoration of chiral and $U(1)_A$ symmetries in excited hadrons is reviewed. Implications of the OPE as well as of the semiclassical expansion for this phenomenon are discussed. A solvable model of the 't Hooft type in 3+1 dimensions is presented, which demonstrates a fast restoration of both chiral and $U(1)_A$ symmetries at larger spins and radial excitations.
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