The doubly-charmed tetraquark in finite and infinite volume

by Fernando Romero-López (MIT Department of Physics)

Tuesday 23 Jan 2024, 16:00 → 18:00 Europe/Zurich

4/2-037 - TH meeting room (CERN)

In this talk, I discuss progress developing and applying the relativistic field-theoretic three-particle finite-volume scattering formalism to systems of nondegenerate mesons.  In particular, I focus on the recently developed formalism for $DD\pi$ systems in the charm C = 2 sector. This includes the isospin-0 channel, in which the recently discovered doubly-charmed tetraquark $T_{cc}(3875)^+$ is expected to manifest as a pole in the $DD\pi \to DD\pi$ scattering amplitude. The formalism presented here can also be applied to lattice QCD settings in which the $D^*$ is bound and, in particular, remains valid below the left-hand cut in $DD^*$ scattering, thus resolving an issue in previous analyses of lattice-determined finite-volume energies.