Yu-Yue Cui | Searcharxiv

arXiv2026

Molecular pentaquarks composed of a ground-state octet baryon and a $P-$wave anticharmed meson

In this work, we investigate the interactions between an excited anticharm meson doublet $(\bar{D}_1, \bar{D}_2^*)$ and ground-state octet baryons $(N, \Lambda, \Sigma, \Xi)$ with the aim of identifying possible molecular pentaquark states. A systematic analysis is performed within the one-boson-exchange model, which incorporates both $S$ and $P$-wave interactions, $S$-$D$ mixing, and coupled-channel effects. By solving the Schr\"{o}dinger equations, we can predict a rich spectrum of loosely bound anticharm molecular pentaquarks with strangeness $|S| = 0, 1, 2$. Our results provide specific quantum number assignments and mass range predictions to guide future experimental searches at facilities such as LHCb and Belle II. The discovery of such states would significantly enrich the hadron spectrum and serve as a critical test of theoretical models for hadronic interactions.

hep-ph↗

arXiv2025

Emergence of charm-strange dibaryons with negative parity via baryon-baryon interactions

Within the framework of the one-boson-exchange model, we systematically perform a coupled channel analysis of the $P-$wave interactions between a charm baryon and light baryon, the involved channels include $\Xi_cN$, $\Lambda_c\Sigma$, $\Xi_c^{\prime}N$, $\Sigma_c\Lambda$, $\Xi_c^*N$, $\Sigma_c^*\Lambda$, $\Sigma_c\Sigma$, and $\Sigma_c^*\Sigma$. Our results can predict several possible molecular candidates, such as a $\Xi_c^{\prime}N$ molecule with $I(J^P)=0(1^-)$, $\Xi_c^{*}N$ molecules with $0(0^-, 1^-, 2^-)$, $\Sigma_c\Sigma$ molecules with $0(1^-)$ and $1(1^-)$, and $\Sigma_c^*\Sigma$ molecules with $0(0^-, 1^-, 2^-)$, and $1(2^-)$. The coupled channel effects significantly influence the formation of the $\Sigma_c\Sigma$ molecule with $1(1^-)$. Furthermore, we analyze the phase shifts for these coupled channel systems. Our analysis not only confirms the existence of the predicted molecules but also identifies potential resonant dibaryons, including a $\Sigma_c\Sigma$ shape-type resonance with $1(1^-)$, a $\Sigma_c^*\Sigma$ shape-type resonance with $1(0^-)$, a $\Lambda_c\Sigma/\Sigma_c\Sigma$ coupled Feshbach-type resonance with $1(1^-)$, and $\Lambda_c\Sigma/\Sigma_c^*\Sigma$ coupled Feshbach-type resonances with $1(0^-, 2^-)$.

hep-ph↗