PT Journal
AU Aceti, F
   Oset, E
   Roca, L
TI Composite nature of the Lambda (1520) resonance
SO Physical Review C
JI Phys. Rev. C
PY 2014
BP 025208
EP 8pp
VL 90
IS 2
DI 10.1103/PhysRevC.90.025208
LA English
AB Recently, the Weinberg compositeness condition of a bound state was generalized to account for resonant states and higher partial waves. We apply this extension to the case of the Lambda (1520) resonance and quantify the weight of the meson-baryon components in contrast to other possible genuine building blocks. This resonance was theoretically obtained from a coupled channels analysis using the s-wave pi Sigma* and K Xi* and the d-wave (K) over bar N and pi Sigma channels, applying the techniques of the chiral unitary approach. We obtain the result that this resonance is essentially dynamically generated from these meson-baryon channels, leaving room for only 15% weight of other kinds of components in its wave function.
ER