Pentaquark states in a chiral potential

Details Pentaquark states in a chiral potential Pentaquark states in a chiral potential

2003-07-18

arxiv.org/abs/hep-ph/0307232v2

Phys.Lett. B571 (2003) 55-60

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures. Some errors in $s$ and $\bar s$ configurations are corrected

Scientific paper

10.1016/j.physletb.2003.07.067

We discuss a possible interpretation for the pentaquark baryon $\Theta^+$ 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 $\Theta^+$ 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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