English

Analysis of the $\Lambda_c(2860)$, $\Lambda_c(2880)$, $\Xi_c(3055)$ and $\Xi_c(3080)$ as D-wave baryon states with QCD sum rules

High Energy Physics - Phenomenology 2017-12-05 v3

Abstract

In this article, we tentatively assign the Λc(2860)\Lambda_c(2860), Λc(2880)\Lambda_c(2880), Ξc(3055)\Xi_c(3055) and Ξc(3080)\Xi_c(3080) to be the D-wave baryon states with the spin-parity JP=32+J^P={\frac{3}{2}}^+, 52+{\frac{5}{2}}^+, 32+{\frac{3}{2}}^+ and 52+{\frac{5}{2}}^+, respectively, and study their masses and pole residues with the QCD sum rules in a systematic way by constructing three-types interpolating currents with the quantum numbers (Lρ,Lλ)=(0,2)(L_\rho,L_\lambda)=(0,2), (2,0)(2,0) and (1,1)(1,1), respectively. The present predictions favor assigning the Λc(2860)\Lambda_c(2860), Λc(2880)\Lambda_c(2880), Ξc(3055)\Xi_c(3055) and Ξc(3080)\Xi_c(3080) to be the D-wave baryon states with the quantum numbers (Lρ,Lλ)=(0,2)(L_\rho,L_\lambda)=(0,2) and JP=32+J^P={\frac{3}{2}}^+, 52+{\frac{5}{2}}^+, 32+{\frac{3}{2}}^+ and 52+{\frac{5}{2}}^+, respectively. While the predictions for the masses of the (Lρ,Lλ)=(2,0)(L_\rho,L_\lambda)=(2,0) and (1,1)(1,1) D-wave Λc\Lambda_c and Ξc\Xi_c states can be confronted to the experimental data in the future.

Keywords

Cite

@article{arxiv.1705.07745,
  title  = {Analysis of the $\Lambda_c(2860)$, $\Lambda_c(2880)$, $\Xi_c(3055)$ and $\Xi_c(3080)$ as D-wave baryon states with QCD sum rules},
  author = {Zhi-Gang Wang},
  journal= {arXiv preprint arXiv:1705.07745},
  year   = {2017}
}

Comments

26 pages, 25 figures