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arXiv · 2507.20751

Strange pentaquarks with a hidden heavy quark-antiquark pair

Sachiko Takeuchi·Alessandro Giachino·Makoto Takizawa·Elena Santopinto·Makoto Oka
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Abstract

The strange pentaquarks with hidden heavy quark pair ($q^3c\bar c$ and $q^3b \bar b$) are investigated by the coupled-channel quark cluster model. Two types of the $q^3$ color-octet configurations are found to provide the attraction, which makes bound states, sharp resonances, and cusps in the baryon meson scattering. A resonance appears at around 4500 MeV in the strange hidden charm sector. Such structures are more clearly seen in the hidden bottom systems.

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Sachiko Takeuchi, Alessandro Giachino, Makoto Takizawa, Elena Santopinto, Makoto Oka. 2025-07-28. Strange pentaquarks with a hidden heavy quark-antiquark pair. https://doi.org/10.1142/11798

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