English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The $I(J^P)={1\over 2}({1\over 2}^-)$, ${1\over 2}({3\over 2}^-)$, and${1\over 2}({5\over 2}^-)$ $uudc\overline{c}$ pentaquarks are investigated bythe quark cluster model. This model, which reproduces the mass spectra of thecolor-singlet $S$-wave $q^3$ baryons and $q\overline{q}$ mesons, also enablesus to evaluate the quark interaction in the color-octet $uud$ configurations.It is shown that the color-octet isospin-${1\over 2}$ spin-${3\over 2}$ $uud$configuration gains attraction. The $uudc\overline{c}$ states with thisconfiguration have structures around the $\Sigma_c{}^{(*)}\overline{D}{}^{(*)}$thresholds: one bound state, two resonances, and one large cusp are found. Weargue that the negative parity pentaquark found by the LHCb experiments may begiven by these structures.

The hidden charm pentaquarks are the hidden color-octet $uud$ baryons?