The existence and properties of the sigma meson have been controversial for almost six
decades, despite playing a central role in the spontaneous chiral symmetry of QCD or in the …

In this paper, we present a review of recent works on weak decay of heavy mesons and
baryons with two mesons, or a meson and a baryon, interacting strongly in the final state …

Using a chiral unitary approach for the meson–baryon interactions, we show that two octets
of Jπ= 1/2− baryon states, which are degenerate in the limit of exact SU (3) symmetry, and a …

Chiral perturbation theory and its unitarized versions have played an important role in our
understanding of the low-energy strong interaction. Yet, so far, such studies typically deal …

Motivated by the Belle measurements of the process Λ c+→ η π+ Λ, we investigate this
process by considering the contributions from the Λ (1670), a 0 (980), and Σ (1385). In …

The strange quark plays a unique role in QCD, reflecting its intermediate mass between the
light and heavy quarks. In recent years, remarkable progress has been made in the …

The s-wave meson-baryon scattering is analyzed for the strangeness S=− 1 and isospin I= 0
sector in a Bethe-Salpeter coupled channel formalism incorporating chiral symmetry. Four …

Assuming that the recently observed hidden-charm pentaquark state, P c (4450), is of
molecular nature as predicted in the unitary approach, we propose to study the decay of Ξ …

A set of coupled two-body scattering equations is solved for the DN system embedded in an
isosymmetric nuclear matter. The in-medium behavior of charmed D mesons,(D+, D 0), is …

A model is developed to describe odd-parity baryon resonances generated dynamically
through a unitary baryon-meson coupled-channels approach. The scheme applies to …