Study of hidden-charm pentaquarks with double strangeness in the coupled-channel formalism

초록

Experimental searches for hidden-charm pentaquarks with strangeness S = ?2, denoted as Pc?css, have recently begun, though these efforts remain in early stages. We study the hidden-charm pentaquark Pc?css using a fully off-mass-shell coupled channel formalism with ten heavy meson and heavy baryon channels, along with an additional J/ψΞ channel, to generate the scattering matrix. The kernel amplitudes are constructed using one-meson exchange diagrams based on an effective Lagrangian that respects heavy quark spin symmetry and hidden-local symmetry. The present calculations reveal eight dynamically-generated resonances: five with negative parity and three with positive parity. Through analysis of their masses, widths, and contributions to the J/ψΞ invariant mass distribution, we provide theoretical predictions to guide ongoing experimenta searches.