PT Journal
AU Molina, R
   Liang, WH
   Xiao, CW
   Sun, ZF
   Oset, E
TI Two states for the Ξ(1820) resonance
SO Physics Letters B
JI Phys. Lett. B
PY 2024
BP 138872
EP 4pp
VL 856
DI 10.1016/j.physletb.2024.138872
LA English
AB We recall that the chiral unitary approach for the interaction of pseudoscalar mesons with the baryons of the decuplet predicts two states for the Xi(1820) resonance, one with a narrow width and the other one with a large width. We contrast this fact with the recent BESIII measurement of the K- Lambda mass distribution in the psi(3686) decay to K- Lambda Xi(+), which demands a width much larger than the average of the PDG, and show how the consideration of the two Xi(1820) states provides a natural explanation to the experimental data.
ER