Systematics of the SU(3) Baryon Spectra and Deformed Oscillator Quark Model

Abstract

We study all the SU(3) baryonic states known experimentally and identify them in the scheme of the deformed oscillator quark (DOQ) model. The DOQ model is motivated by confinement of quarks and chiral symmetry breaking, which are the most important nonperturbative phenomena of QCD. We find most of the baryonic states fall into the DOQ scheme. We then attempt to study the microscopic origin of the DOQ model using a model of three constituent quarks with two-body interactions. We find, however, that such a simple treatment is not able to produce the large deformation effect. We argue then that the confinement caused by the gluon dynamics is essentially important for the deformed baryons. * )

Instability of the hedgehog shape for the octet baryon in the chiral quark soliton model

“…There, the effects of the Coriolis force were neglected in the shape of the static soliton and included perturbatively in the state vector for the collective rotation. For the excited states of the baryon, there are several studies of this problem in the nonrelativistic quark model [26].…”

Relativistic corrections to decays of heavy baryons in the quark model

“…Historically, the Roper resonance has been a mysterious state because the observed mass is much lower than that predicted by the quark model, and the inverse ordering with the negative parity state is puzzling. These unexpected results have induced great amount of discussions to understand its nature both experimentally [7,8] and theoretically [9][10][11][12][13][14][15][16]. One promising physical interpretation is that the Roper resonance is a quark core coupled by meson clouds [17,18].…”

Systematic study of hadronic excitation energy using Schottky anomaly

“…The property of the Roper resonance is one of the important subject in hadron physics. It was pointed out that similar lower excited states with positive parity are also found for hyperons [14], and recently their heavy baryon candidates have been proposed in Ref. [15].…”