Parity doublets in the baryon spectrum
arXiv:hep-ph/0501043 · doi:10.1016/j.nuclphysa.2005.03.122
Abstract
Physics of the low-lying and high-lying hadrons in the light flavors sector is reviewed. While the low-lying hadrons are strongly affected by both and spontaneous breakings, in the high-lying hadrons these symmetries are restored. A manifestation is a persistence of the chiral multiplet structure in both baryon and meson spectra. A fundamental origin of this phenomenon is that effects of quantum fluctuations of both quark and gluon fields must vanish at large or and a semiclassical description becomes adequate. A relation between the chiral symmetry restoration and the string picture of excited hadrons is discussed.
12 pages. Plenary talk given at 10th Int. Conf. on the Structure of Baryons (Baryons 04), October 25-29, 2004, Palaiseau, France; typos have been removed