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Pentaquark states in a chiral potential | Atsushi Hosaka
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18 Jul 2003 | Journal: | Phys.Lett. B571 (2003) 55-60 | Subject: | hep-ph | Abstract: | 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. | Source: | arXiv, hep-ph/0307232 | Services: | Forum | Review | PDF | Favorites |
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