48 research outputs found
Wave functions for dynamically generated resonances; the two and
In this work we develop a formalism to evaluate wave functions in momentum
and coordinate space for the resonant states dynamically generated in a unitary
coupled channel approach. The on shell approach for the scattering matrix,
commonly used, is also obtained in Quantum Mechanics with a separable
potential, which allows one to write wave functions in a trivial way. We
develop useful relationships among the couplings of the dynamically generated
resonances to the different channels and the wave functions at the origin. The
formalism provides an intuitive picture of the resonances in the coupled
channel approach, as bound states of one bound channel, which decays into open
ones. It also provides an insight and practical rules for evaluating couplings
of the resonances to external sources and how to deal with final state
interaction in production processes. As an application of the formalism we
evaluate the wave functions of the two states in the , and other coupled channels. It also offers a practical way
to study three body systems when two of them cluster into a resonance.Comment: 5pages, 1 figure. To appear in the proceedings of the International
Workshop on Chiral Symmetry in Hadrons and Nuclei (Chiral10), Valencia,
Spain, Jun 21-24, 201
Formation of mesic nuclei
We study the structure and formation of the mesic nuclei to
investigate the in-medium modification of the -meson spectral function at
finite density. We consider (), () and ()
reactions to produce a -meson inside the nucleus and evaluate the effects
of its medium modifications to the reaction cross sections. We also estimate
the consequences of the uncertainties of the selfenergy in medium to
the -nucleus interaction. We find that it may be possible to see a peak
structure in the reaction spectra for the strong attractive potential cases. On
the other hand, for strong absorptive interaction cases with relatively weak
attractions, it is very difficult to observe clear peaks and we may need to
know the spectrum shape in a wide energy region to deduce the properties of
.Comment: 11 pages, 8 figure