Newly discovered Xi(0)(c) resonances and their parameters

Abstract

The aim of the present article is investigation of the newly observed resonances Xi(c)(2923)(0), Xi(c)(2939)(0), and Xi(c)(2965)(0) which are real candidates to charm-strange baryons. To this end, we calculate the mass and pole residue of the ground-state and excited 1P and 2S spin-1/2 flavorsextet baryons Xi(0)(c), Xi(0)(c) (1/2(-)) and Xi(0)(c) (1/2(+)) with quark content csd, respectively. The masses and pole residues of the ground-state and excited spin-3/2 baryons Xi(0)(c) c are found as well. Spectroscopic parameters of these particles are computed in the context of the QCD two-point sum rule method. Widths of the excited baryons are evaluated through their decays to final states Lambda K-+(c)- and Xi(0)(c) pi. These processes are explored by means of the full QCD light-cone sum rule method necessary to determine strong couplings at relevant vertices. Obtained predictions for the masses and widths of the four excited baryons, as well as previous results for 1P and 2S flavor-antitriplet spin-1/2 particles Xi(0)(c) are confronted with available experimental data on Xi(0)(c) resonances to fix their quantum numbers. Our comparison demonstrates that the resonances Xi(c)(2923)(0) and Xi(c)(2939)(0) can be considered as 1P excitations of the spin-1/2 flavor-sextet and spin3/2 baryons, respectively. The resonance Xi(c)(2965)(0) may be interpreted as the excited 2S state of either spin-1/2 flavorsextet or antitriplet baryon.