5 research outputs found
Strange and Heavy Flavoured Hypernuclei in Chiral Soliton Models
The extention of the chiral soliton approach to hypernuclei - strange or
heavy flavoured - becomes more reliable due to success in describing of other
properties of nuclei, e.g. the symmetry energy of nuclei with atomic numbers up
to ~30. The binding energies of the ground states of light hypernuclei with
strangeness S=-1 have been described in qualitative agreement with data. The
existence of charmed or beautiful hypernuclei and Theta-hypernuclei (strange,
charmed or beautiful) with large binding energy is expected within same
approach.Comment: 5 pages, 4 figures. Talk given at the 9-th International Conference
on Hypernuclei and Strange Particle Physics (HYP2006), Mainz, Germany, 10-14
October 2006. Extended version "Baryon States in Chiral Soliton Models; from
Nuclei to Exotic Baryons" presented at the International Workshop "High
Energy Physics in the LHC Era", Universidad Tecnica Federico Santa Maria,
Valparaiso, Chile, 11-15 December 200
Flavored exotic multibaryons and hypernuclei in topological soliton models
The energies of baryon states with positive strangeness, or anti-charm
(-beauty) are estimated in 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), the states with heavy anti-flavors can be bound with
respect to strong interactions in the original Skyrme variant of the model (SK4
variant). The binding energies of anti-flavored states are estimated also in
the variant of the model with 6-th order term in chiral derivatives in the
lagrangian as solitons stabilizer (SK6 variant). The latter variant is less
attractive, and nuclear states with anti-charm or anti-beauty can be unstable
relative to strong interactions. The chances to get bound hypernuclei with
heavy antiflavors are greater within "nuclear variant" of the model with
rescaled model parameter (Skyrme constant e or e' decreased by ~30%) which is
expected to be valid for baryon numbers greater than B ~10. The rational map
approximation is used to describe multiskyrmions with baryon number up to ~30
and to calculate the quantities necessary for their quantization (moments of
inertia, sigma-term, etc.).Comment: 24 pages, 7 table
Mass splittings of nuclear isotopes in chiral soliton approach
The differences of the masses of nuclear isotopes with atomic numbers between
\~10 and ~30 can be described within the chiral soliton approach in
satisfactory agreement with data. Rescaling of the model is necessary for this
purpose - decrease of the Skyrme constant by about 30%, providing the "nuclear
variant" of the model. The asymmetric term in Weizsaecker-Bethe- Bacher mass
formula for nuclei can be obtained as the isospin dependent quantum correction
to the nucleus energy. Some predictions for the binding energies of neutron
rich nuclides are made in this way, from, e.g. Be-16 and B-19 to Ne-31 and
Na-32. Neutron rich nuclides with high values of isospin are unstable relative
to strong interactions. The SK4 (Skyrme) variant of the model, as well as SK6
variant (6-th order term in chiral derivatives in the lagrangian as solitons
stabilizer) are considered, and the rational map approximation is used to
describe multiskyrmions.Comment: 16 pages, 10 tables, 2 figures. Figures are added and few misprints
are removed. Submitted to Phys. Atom. Nucl. (Yad. Fiz.
Nuclear bound states of antikaons, or quantized multiskyrmions?
The spectrum of strange multibaryons is considered within the chiral soliton
model using one of several possible SU(3$ quantization models (the bound state
rigid oscillator version). The states with energy below that of antikaon and
corresponding nucleus can be interpreted as antikaon-nucleus bound states. In
the formal limit of small kaon mass the number of such states becomes large,
for real value of this mass there are at least several states. For large values
of binding energies interpretation of such states just as antikaon-nuclear
bound states becomes more ambiguous.Comment: Corrections, amendments and additions made, references adde