Positive Parity Excited Baryons in a Quark Model with Hyperfine Interactions

Isgur, Nathan; Karl, Gabriel

doi:10.1103/PhysRevD.19.2653

Positive Parity Excited Baryons in a Quark Model with Hyperfine Interactions

Nathan Isgur
(
- Oxford U.
)
,
Gabriel Karl
(
- Rutherford
)

Jun, 1978

56 pages

Published in:

Phys.Rev.D 19 (1979) 2653,
Phys.Rev.D 23 (1981) 817 (erratum)

DOI:

Report number:

RL-78-045

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Abstract: (APS)

A quark model suggested by quantum chromodynamics with strong spin-dependent forces of magnetic-dipole-magnetic-dipole character perturbing a flavor-independent confinement potential is applied to lowlying positive-parity excited baryons. SU(3) is broken only by quark masses, and this leads to a new choice of basis states in the hyperon sector; couplings to K¯N are especially transparent in this basis. The results, which are largely determined by previous analyses, are in good agreement with the known properties of these states. Spin-orbit forces are once again found to be negligible.

HADRON SPECTROSCOPY
BARYON: EXCITED STATE
BARYON: PARITY
PARITY: BARYON
HYPERFINE STRUCTURE
SYMMETRY BREAKING: SU(3)
ANTI-K NUCLEON: COUPLING
COUPLING: ANTI-K NUCLEON
QUARK

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Figures(0)

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