Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral-Soliton Predictions for Exotic Baryons   We re-analyze the predictions of chiral-soliton models for the masses and
decay widths of baryons in the exotic antidecuplet of flavour SU(3). The
calculated ranges of the chiral-soliton moment of inertia and the \pi-nucleon
scattering \Sigma term are used together with the observed baryon octet and
decuplet mass splittings to estimate 1430 MeV < m_{\Theta^+} < 1660 MeV} and
1790 MeV < m_{\Xi^{--}} < 1970 MeV. These are consistent with the masses
reported recently, but more precise predictions rely on ambiguous
identifications of non-exotic baryon resonances. The overall decay rates of
antidecuplet states are sensitive to the singlet axial-current matrix element
in the nucleon. Taking this from polarized deep-inelastic scattering
experiments, we find a suppression of the total \Theta^+ and \Xi^{--} decay
widths that may not be sufficient by itself to reproduce the narrow widths
required by experiments. We calculate SU(3) breaking effects due to
representation mixing and find that they tend to suppress the \Theta^+ decay
width, while enhancing that of the \Xi^{--}. We predict light masses for some
exotic 27 baryons, including the I=1, J^P={3/2}^+ \Theta^+ and I=3/2,
J^P={3/2}^+ \Xi multiplets, and calculate their decay widths.

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The categories of this paper are: econ
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
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The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: patt-sol