“School of Physics”
Back to Papers HomeBack to Papers of School of Physics
| Paper IPM / P / 15198 |
|
||||||
| Abstract: | |||||||
|
The mass and pole residue of the first orbitally and radially
excited 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
Ξ(1690)→ ΣK and 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 ~Ξ and ratio of the Br(~Ξ→ ΣK)/Br(~Ξ→ Λ K), with ~Ξ representing the orbitally excited state in Ξ channel, are in
nice agreement with the experimental data of the Belle
Collaboration. This allows us to conclude that the Ξ(1690) state,
most probably, has negative parity.
Download TeX format |
|||||||
| back to top | |||||||
