Analysis of the structure of $$\Xi (1690)$$ through its decays

The European Physical Journal C, May 2018

The mass and pole residue of the first orbitally and radially excited $$\Xi$$ state as well as the ground state residue are calculated by means of the two-point QCD sum rules. Using the obtained results for the spectroscopic parameters, the strong coupling constants relevant to the decays $$\Xi (1690)\rightarrow \Sigma K$$ and $$\Xi (1690) \rightarrow \Lambda K$$ are calculated within the light-cone QCD sum rules and width of these decay channels are estimated. The obtained results for the mass of $${\widetilde{\Xi }}$$ and ratio of the $$Br(\widetilde{\Xi }\rightarrow \Sigma K)/Br(\widetilde{\Xi }\rightarrow \Lambda K)$$, with $$\widetilde{\Xi }$$ representing the orbitally excited state in $$\Xi$$ channel, are in nice agreement with the experimental data of the Belle Collaboration. This allows us to conclude that the $$\Xi (1690)$$ state, most probably, has negative parity.

This is a preview of a remote PDF: https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-018-5888-8.pdf

T. M. Aliev, K. Azizi, H. Sundu. Analysis of the structure of $$\Xi (1690)$$ through its decays, The European Physical Journal C, 2018, 396, DOI: 10.1140/epjc/s10052-018-5888-8