Towards the quark mass dependence of $T_{cc}$

by Saša Prelovšek

Tuesday 28 May 2024, 16:00 → 18:00 Europe/Zurich

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

I will present how the DD* scattering amplitude and the pole positions in Tcc channel vary with the charm and the light-quark masses. This will be based on our lattice results for five charm quark masses and results by other groups for various light-quark masses. The EFT analysis implies attraction at short range and a slight repulsion at long range mediated by one-pion exchange for mpi > mD*−mD (related to left-hand cut). I’ll sketch how the Tcc pole transitions between a resonance, virtual and bound state as charm and light quark masses are varied.