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arXiv · hep-ph/0307232

Pentaquark states in a chiral potential

Atsushi Hosaka
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Abstract

We discuss a possible interpretation for the pentaquark baryon $Θ^+$ which has an exotic quantum number of strangeness $S = +1$. The role of the pion which modifies the structure of single-particle levels of quarks is examined. When the pion field is sufficiently strong, the ground state of five quarks for $Θ^+$ acquires positive parity. If this is the case, an excited state may appear slightly above the ground state with negative parity.

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Atsushi Hosaka. 2003-09-01. Pentaquark states in a chiral potential. https://doi.org/10.1016/j.physletb.2003.07.067

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