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.
Mardi
28 mai/24
16:00
-
18:00
(Europe/Zurich)
Towards the quark mass dependence of $T_{cc}$
Where:
4/2-037 at CERN