Pseudoscalar meson and charmed baryon scattering lengths

Pseudoscalar Meson and Charmed Baryon Scattering Lengths

Up to now many heavy hadrons have been discovered experimentally. Their inner structures and interactions attract much attention. Some of them are speculated to be possible new hadron states beyond the traditional quark model. For example, the newly discovered Zb states are treated as the B̄ (∗)B∗ molecular states [1, 2]. Many other molecular states, such as those composed of ΞcΞc, DD̄ ∗, are als...

Decuplet contribution to the meson-baryon scattering lengths

We calculate decuplet contributions to the s-wave pseudoscalar meson octet-baryon scattering lengths to the third order in heavy baryon chiral perturbation theory (HBχPT). Using experimental pion-nucleon and kaon-nucleon scattering lengths as inputs, we determine low-energy constants and predict other meson-baryon scattering lengths. Numerically we consider three cases: (1) the case with only b...

Charmed Meson Scattering from Lattice QCD

Pseudoscalar–meson decuplet–baryon coupling constants in light cone QCD

Taking into account the SU(3)f breaking effects, the strong coupling constants of the π, K and η mesons with decuplet baryons are calculated within light cone QCD sum rules method. It is shown that all coupling constants, even in the case of SU(3)f breaking, are described in terms of only one universal function. It is shown that for Ξ∗0 → Ξ∗0η transition violation of SU(3)f symmetry is very lar...

Aspects of Strangeness −1 Meson-Baryon Scattering

We consider meson-baryon interactions in S-wave with strangeness −1. This is a sector populated by plenty of resonances interacting in several two-body coupled channels. We consider a large set of experimental data, where the recent experiments are remarkably accurate. This requires a sound theoretical description to account for all the data and we employ Unitary Chiral Perturbation Theory up t...