We investigate low-energy $N\phi$ scattering driven by a pole-enhanced triangle-like diagram, in which the two-Kaon-exchange contribution is promoted by the near-threshold $\Lambda(1405)$ pole in the $N\bar K$ subsystem. Using an unphysical Kaon mass motivated by lattice simulations, we evaluate the $N\phi$ scattering length and find that this mechanism generates an attractive interaction with...
Near-threshold vector-meson photoproduction offers a promising way to investigate both exotic-hadron production and the internal structure of hadronic and nuclear targets. In particular, (J/\psi) photoproduction has attracted considerable attention as a possible channel for searching for hidden-charm pentaquark states and as a probe of the gravitational form factors of the proton. However, the...
The S-matrix describing the scattering process can be expressed in terms of projection operators onto the allowed spin–isospin channels and the corresponding phase shifts. Using the entanglement entropy in the spin or isospin space of the two-particle state, one can define the entanglement power, which quantifies the ability of the S-matrix to generate entanglement in the system. By...
