Analysis of the structure of $$\Xi (1690)$$ Ξ(1690) through its decays
Abstract The mass and pole residue of the first orbitally and radially excited $$ \Xi $$ Ξ 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 deca...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2018-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-018-5888-8 |
| Summary: | Abstract The mass and pole residue of the first orbitally and radially excited $$ \Xi $$ Ξ 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 $$\Xi (1690)\rightarrow \Sigma K$$ Ξ(1690)→ΣK and $$\Xi (1690) \rightarrow \Lambda K$$ Ξ(1690)→ΛK are calculated within the light-cone QCD sum rules and width of these decay channels are estimated. The obtained results for the mass of $$ {\widetilde{\Xi }}$$ Ξ~ and ratio of the $$Br(\widetilde{\Xi }\rightarrow \Sigma K)/Br(\widetilde{\Xi }\rightarrow \Lambda K)$$ Br(Ξ~→ΣK)/Br(Ξ~→ΛK) , with $$ \widetilde{\Xi } $$ Ξ~ representing the orbitally excited state in $$ \Xi $$ Ξ channel, are in nice agreement with the experimental data of the Belle Collaboration. This allows us to conclude that the $$\Xi (1690)$$ Ξ(1690) state, most probably, has negative parity. |
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| ISSN: | 1434-6044 1434-6052 |