The hidden charm pentaquarks are the hidden color-octet uud baryons?
The I(JP)=12(12−), 12(32−), and 12(52−) uudcc‾ pentaquarks are investigated by the quark cluster model. This model, which reproduces the mass spectra of the color-singlet S-wave q3 baryons and qq‾ mesons, also enables us to evaluate the quark interaction in the color-octet uud configurations. It is...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-01-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269316306979 |
| Summary: | The I(JP)=12(12−), 12(32−), and 12(52−) uudcc‾ pentaquarks are investigated by the quark cluster model. This model, which reproduces the mass spectra of the color-singlet S-wave q3 baryons and qq‾ mesons, also enables us to evaluate the quark interaction in the color-octet uud configurations. It is shown that the color-octet isospin-12 spin-32 uud configuration gains an attraction. The uudcc‾ states with this configuration have structures around the Σc(⁎)D‾(⁎) thresholds: one bound state, two resonances, and one large cusp are found. We argue that the negative parity pentaquark found by the LHCb experiments may be given by these structures. |
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| ISSN: | 0370-2693 1873-2445 |