arXiv subjects

Ji-Hai Pan

Publications and source records attributed to Ji-Hai Pan.

5 recordsLinked to original sources

arXiv2026

Investigating the mass spectra of $1F$-wave singly heavy $Σ_{Q}$, $Ξ^{\prime}_{Q}$, and $Ω_{Q}$ baryons

In this work, we enumerated the mass spectra of the experimentally unobserved $1F$-wave states with the the orbital angular momentum $L$ = 3 for the singly heavy $Σ_{Q}$, $Ξ^{\prime}_{Q}$, and $Ω_{Q}$ $(Q=c, b)$ baryons in the framework of quark-diquark configuration using the Regge trajectory model and the scaling rules. To determine the effective masses of the heavy quark and two light quarks, the relativistic effective mass formula are employed by combining the Coulomb potential. Within the spin-dependent Hamiltonian, we construct the mass shift forms as a non-diagonal symmetric $6\times 6$ matrix for the $1F$-wave states of $Σ_{Q}$, $Ξ^{\prime}_{Q}$, and $Ω_{Q}$ baryons. Our analysis of mass spectra provides valuable insights to guide future experimental investigations, and enhances the understanding of the spectroscopic properties of unobserved $1F$-wave orbital excitations for these singly heavy baryons.

hep-ph↗

arXiv2025

Study of the mass spectra of doubly heavy $Ξ_{QQ^{\prime}}$ and $Ω_{QQ^{\prime}}$ baryons

LHCb Collaboration first observed a doubly charmed baryon $Ξ^{++}_{cc}$ in the $Λ^{+}_{c}K^{-}π^{+}π^{+}$ decay with a mass of $3621.40\pm0.72\pm0.27$ MeV. In this paper, we enumerated the mass spectra of the radial and orbital excited states for the doubly heavy $Ξ_{QQ^{\prime}}$ and $Ω_{QQ^{\prime}}$ baryons using the Regge trajectory model and the scaling rules. Our studies suggest that $Ξ^{++}_{cc}$ can be grouped into the $1S$-wave state with the spin-parity quantum number $J^{P} = 1/2^{+}$. On the other hand, the mass of $Ξ_{cc}$ state with $J^{P} = 3/2^{+}$ is predicted to be $3699.69 \pm 4.59$ MeV. We also predict the mass spectra of the unknown ground and excited states for the doubly heavy $Ξ_{QQ^{\prime}}$ and $Ω_{QQ^{\prime}}$ baryons, which provide useful references for the experimental test in the future.

hep-ph↗

arXiv2024

Investigation of the mass spectra of singly heavy baryons $Σ_{Q}$, $Ξ^{\prime}_{Q}$ and $Ω_{Q}$ $(Q=c, b)$ in the Regge trajectory model

Very recently, LHCb Collaboration observed that two new $Ω_{c}^{0}$ states decay into $Ξ^{+}_{c}K^{-}$ with masses of about $3185$ MeV and $3327$ MeV. However, their spin parity quantum numbers $J^{P}$ have not been determined. In this paper, we exploit the quark-diquark model, the linear Regge trajectory and the perturbation treatment method to analyze the mass spectra of the discovered experimental data for the singly heavy baryons $Σ_{c}/Σ_{b}$, $Ξ^{\prime}_{c}/Ξ^{\prime}_{b}$ and $Ω_{c}/Ω_{b}$. In addition, we further predict the mass spectra of several unobserved $Σ_{c}/Σ_{b}$, $Ξ^{\prime}_{c}/Ξ^{\prime}_{b}$ and $Ω_{c}/Ω_{b}$ baryons. In the case of the $Ω_c(3185)^{0}$ and $Ω_c(3327)^{0}$ states, we determine $Ω_{c}(3185)^{0}$ as $2S$ state and $Ω_{c}(3327)^{0}$ as $1D$ state with $J^{P}=1/2^{+}$ and $J^{P}=3/2^{+}$, respectively. An overall good agreement of the obtained predictions with available experimental data are found.

hep-ph↗

arXiv2023

Remarks on the $S$-wave masses of singly heavy mesons

Based on the study of the string model methods of singly heavy mesons and singly heavy baryons, we calculate the mass spectrum of $1S$-and $2S$-wave for both charm and bottom mesons$(D/D_{s}, B/B_{s})$. Experimentally, there are most masses spectra of $1S$-wave have been found, while the masses part of the $2S$-state is not determined. In this paper, we will use singly light quark or diquark model images and Regge trajectory models, combined with perturbation processing methods, to analyze and study the observed singly heavy mesons, further predict the unobserved mesons masses and their corresponding spin-parity quantum numbers.

hep-ph↗

arXiv2021

A Mixing Coupling Scheme for Spectra of Singly Heavy Baryons with Spin-1 Diquarks in P-waves

A new scheme of state classification is proposed and applied to analyze masses of the heavy baryons $Ω_{Q}$, $Σ_{Q}$ and $Ξ_{Q}^{\prime}$ in P-waves. The results confirm all excited $Ω_{c}$ and $Ω_{b}$ baryons reported recently by LHCb to be bound states of a P-wave $ss$-diquark and a respective charm or bottom quark, and thereby predict Regge trajectories for more excited $Ω_{c}$ and $Ω_{b}$ baryons. We suggest one excited {$J^{P}=5/2^{-}$} $Ω_{b}$ state to be unseen by LHCb around $6352$ MeV, and predict P-wave masses of all spin-partners of the odd-parity baryons $Σ_{c}(2800)/Ξ_{c}^{\prime}(2942)$ and $Σ_{b}(6097)$/$Ξ_{b}^{\prime }(6227)$. A computation is further given in a relativized potential quark models to explain matched values of spin couplings of all considered baryons, by which a scaling law for these spin couplings is discussed.

hep-ph↗