P-Wave hyperons in nonperturbative quark dynamics

Journal Article · Fri Feb 15 00:00:00 EST 2008 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778808020142· OSTI ID:22028168

Driga, O. N., E-mail: [e-mail]; Narodetskii, I. M., E-mail: [e-mail]; Veselov, A. I., E-mail: [e-mail] ^[1]

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1. Institute for Theoretical and Experimental Physics (Russian Federation)

We carry out an investigation of the P-wave hyperons {Lambda} {Sigma}, and {xi} employing the field correlator method in QCD. This method allows us to derive the effective Hamiltonian (EH) approach successfully applied to the meson and ground-state baryon spectra. The EH is written in the form of the nonrelativistic three-quark Hamiltonian with perturbative Coulomb-like and nonperturbative string interactions and the specific mass term. We solve the three-quark problem using the hyperspherical approach. With only two parameters, the string tension {sigma} and the strong coupling constant {alpha}{sub s}, a unified quantitative description of the ground and excited hyperon states is achieved. In particular, we predict that all the hyperon states have the similar cost (in {Delta}) {approx}460 MeV.

• OSTI ID: 22028168
• Journal Information: Physics of Atomic Nuclei, Vol. 71, Issue 2; Other Information: Copyright (c) 2008 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON SPECTROSCOPY
COUPLING CONSTANTS
GROUND STATES
HAMILTONIANS
LAMBDA BARYONS
MESON SPECTROSCOPY
P WAVES
QUANTUM CHROMODYNAMICS
QUARKS
SIGMA BARYONS
STRING MODELS
STRONG-COUPLING MODEL
XI BARYONS