2016/09/30 by Bing Chen, Ke-Wei Wei, Xiang Liu +1 · 2 citations
Physics and Astronomy · #Baryon #Branching fraction #Charmed baryons #Excited state #Lambda baryon #Particle physics theoretical and experimental studies #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #Quark #Quark model #Spectral line #hep-ex #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-017-4708-x
published as Eur. Phys. J. C (2017) 77:154 · 16 pages, 3 figures, 13 tables. Accepted by Eur. Phys. J. C
openalex publication_date 2017/03/01 · openalex created_date 2017/03/16 · arxiv created 2017/03/20 · arxiv updated 2017/03/21 · openalex updated_date 2026/08/05
In this work, we systematically study the mass spectra and strong decays of 1P and 2S charmed and charmed-strange baryons in the framework of non-relativistic constituent quark models. With the light quark cluster–heavy quark picture, the masses are simply calculated by a potential model. The strong decays are studied by the Eichten–Hill–Quigg decay formula. Masses and decay properties of the well-established 1S and 1P states can be reproduced by our method. Σ c(2800)0,+,++ can be assigned as a Σ c2(3/2-) or Σ c2(5/2-) state. We prefer to interpret the signal Σ c(2850)0 as a 2S(1/2+) state although at present we cannot thoroughly exclude the possibility that this is the same state as Σ c(2800)0 . Λ c(2765)+ or Σ c(2765)+ could be explained as the Λ c+(2S) state or Σ +c1(1/2-) state, respectively. We propose to measure the branching ratio of \mathcal B(Σ c(2455)π )/\mathcal B(Σ c(2520)π ) in the future, which may disentangle the puzzle of this state. Our results support Ξ c(2980)0,+ as the first radial excited state of Ξ c(2470)0,+ with JP=1/2+ . The assignment of Ξ c(2930)0 is analogous to Σ c(2800)0,+,++ , i.e., a Ξ ^′ c2(3/2-) or Ξ ^′ c2(5/2-) state. In addition, we predict some typical ratios among partial decay widths, which are valuable for experimental search for these missing charmed and charmed-strange baryons.