Parity doubling in the high baryon spectrum: near-degenerate three-quark quartets

Details Parity doubling in the high baryon spectrum: near-degenerate three-quark quartets Parity doubling in the high baryon spectrum: near-degenerate three-quark quartets

2008-10-24

arxiv.org/abs/0810.4462v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Proceedings of the 2008 Bled miniworkshop "Few-Quark States and the Continuum". Three references added

Scientific paper

We report on the first calculation of excited baryons with a chirally symmetric Hamiltonian, modeled after Coulomb gauge QCD (or upgraded from the Cornell meson potential model to a field theory in all of Fock-space) showing the insensitivity to chiral symmetry breaking. As has recently been understood, this leads to doubling between two hadrons of equal spin and opposite parity. As a novelty we show that three-quark, for example Delta states, group into quartets with two states of each parity, all four states having equal angular momentum J. Diagonalizing the chiral charge expressed in terms of quarks we show that the quartet is slightly split into two parity doublets by the tensor force, all splittings decreasing to zero high in the spectrum. Our specific calculation is for the family of maximum-spin excitations of the Delta baryon. We provide a model estimate of the experimental accuracy needed to establish Chiral Symmetry Restoration in the high spectrum. We suggest that a measurement of masses of high-partial wave Delta resonances with an accuracy of 50 MeV should be sufficient to unambiguously establish the approximate degeneracy, and test the concept of running quark mass in the infrared.

Affiliated with

Also associated with

No associations

Rating

Parity doubling in the high baryon spectrum: near-degenerate three-quark quartets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Parity doubling in the high baryon spectrum: near-degenerate three-quark quartets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Parity doubling in the high baryon spectrum: near-degenerate three-quark quartets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-698307