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Flavored exotic multibaryons and hypernuclei in topological soliton models

  • Nuclei, Particles, Fields, Gravitation, and Astrophysics
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Abstract

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 (Θ-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 a out 30%), which is expected to be valid for baryon numbers greater than B ∼ 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.).

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  1. Institute for Nuclear Research, Russian Academy of Sciences, Moscow, 117312, Russia

    V. B. Kopeliovich & A. M. Shunderuk

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  1. V. B. Kopeliovich
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From Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, Vol. 127, No. 5, 2005, pp. 1055–1074.

Original English Text Copyright © 2005 by Kopeliovich, Shunderuk.

This article was submitted by authors in English.

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Kopeliovich, V.B., Shunderuk, A.M. Flavored exotic multibaryons and hypernuclei in topological soliton models. J. Exp. Theor. Phys. 100, 929–948 (2005). https://doi.org/10.1134/1.1947317

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