2016/06/20 by Pablo G. Ortega, P. G. Ortega, D. R. Entem +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Constituent quark #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #Quark model #Quarkonium #hep-ph
paper · pdf · doi:10.1016/j.physletb.2016.11.008
5 pages, 2 tables
arxiv created 2016/06/20 · openalex publication_date 2016/11/10 · arxiv updated 2017/02/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The recently discovered P c ( 4380 ) + and P c ( 4450 ) + states at LHCb have masses close to the ⁎ D ¯ Σ c ⁎ and ⁎ D ¯ ⁎ Σ c thresholds, respectively, which suggest that they may have significant meson–baryon molecular components. We analyze these states in the framework of a constituent quark model which has been applied to a wide range of hadronic observables, being the model parameters, therefore, completely constrained. The P c ( 4380 ) + and P c ( 4450 ) + are studied as molecular states composed by charmed baryons and open charm mesons. Several bound states with the proper binding energy are found in the ⁎ D ¯ Σ c ⁎ and ⁎ D ¯ ⁎ Σ c channels. We discuss the possible assignments of these states from their decay widths. Moreover, two more states are predicted, associated with the D ¯ Σ c and ⁎ ⁎ D ¯ ⁎ Σ c ⁎ thresholds.