Towards the LHCb pentaquark modes in the single-charm sector

2025/11/19 by Shen, Chao-Wei, Lin, Yong-Hui, Jing, Hao-Jie
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · doi:10.48550/arxiv.2511.15649

openalex publication_date 2025/11/19 · openalex created_date 2025/11/23 · openalex updated_date 2026/07/28

Abstract

The mass spectrum of Λ_c baryon family is investigated within the DN-D^*N coupled-channel framework using two phenomenological approaches for the low-energy D^(*) N interactions: the heavy quark effective theory and the flavor-symmetry-constrained effective Lagrangian method. It is shown that the LHCb pentaquark states have direct analogs in the Λ_c family. Specifically, Λ_c(2765), Λ_c(2910), and Λ_c(2940) mirror the patterns of P_cc(4312), P_cc(4440), and P_cc(4457), respectively. These mirror pentaquark modes offer valuable insights into the quantum numbers of the two heavy P_cc states, which remain experimentally undetermined. Further exploration of such correlations among exotic hadronic states across different flavor sectors will be crucial for developing a comprehensive theoretical understanding of the modern hadron spectrum.

Citations

• A short review on QCD sum rule studies of P-wave single heavy baryons
• Study of possible DND^* bound states
• Three ways to decipher the nature of exotic hadrons: multiplets, three-body hadronic molecules, and correlation functions
• Hadronic molecules
• The Octet Model and its Clebsch-Gordan Coefficients

Cited by

• Λ_c(2910) and Λ_c(2940) productions in p p annihilation

Related

• Interpretation of LHCb Hidden-Charm Pentaquarks within the Compact Diquark Model
• Exploration of the LHCb P_c states and possible resonances in a unitary coupled-channel model
• Study of hidden-charm, doubly-strange pentaquarks in Λ_b→ J/ψΞ^- K⁺ and Ξ_b→ J/ψΞ^- π⁺
• Prediction of P_cc states in quark model
• Production mechanism of the hidden charm pentaquark states P_cc