Flavored exotic multibaryons and hypernuclei in topological soliton models

The energies of baryon states with positive strangeness, or anticharm (antibeauty), are estimated in the chiral soliton approach, in the 'rigid oscillator' version of the bound-state soliton model proposed by Klebanov and Westerberg. Positive strangeness states can appear as relatively nar...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2005-05, Vol.100 (5), p.929-948
Main Authors: Kopeliovich, V. B., Shunderuk, A. M.
Format: Article
Language:English
Subjects:
BARYON NUMBER
BARYONS
BINDING ENERGY
BOUND STATE
CHIRAL SYMMETRY
CHIRALITY
HYPERNUCLEI
LAGRANGIAN FUNCTION
MOMENT OF INERTIA
NONLINEAR PROBLEMS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUANTIZATION
QUANTUM FIELD THEORY
SKYRME POTENTIAL
SOLITONS
STRANGENESS
STRONG INTERACTIONS
TOPOLOGY
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Summary:The energies of baryon states with positive strangeness, or anticharm (antibeauty), are estimated in the chiral soliton approach, in the 'rigid oscillator' version of the bound-state soliton model proposed by Klebanov and Westerberg. Positive strangeness states can appear as relatively narrow nuclear levels ({theta}-hypernuclei), and the states with heavy antiflavors can be bound with respect to strong interactions in the original Skyrme variant of the model (SK4 variant). The binding energies of antiflavored states are also estimated in the variant of the model with a sixth-order term in chiral derivatives added to the Lagrangian to stabilize solitons (SK6 variant). This variant is less attractive, and nuclear states with anticharm and antibeauty can be unstable relative to strong interactions. The chances of obtaining bound hypernuclei with heavy antiflavors increase within the 'nuclear variant' of the model with a rescaled model parameter (the Skyrme constant e or e' decreased by about 30%), which is expected to be valid for baryon numbers greater than B {approx} 10. The rational map approximation is used to describe multiskyrmions with a baryon number of up to about 30 and to calculate the quantities necessary for their quantization (moments of inertia, sigma term, etc.)
ISSN:1063-7761
1090-6509
DOI:10.1134/1.1947317