Speaker
Ivan Vujmilović
(Jozef Stefan Institute)
Description
The determination of the $DD^{*}$ scattering amplitude from lattice QCD is complicated by long-range interactions. In particular, the scattering amplitude exhibits a left-hand branch cut in the kinematical region where several states from lattice simulations appear, requiring careful treatment. We tackle this problem by adopting plane-wave and effective-field-theoretic methods, which also address partial wave mixing. In addition, we incorporate a diquark-antidiquark interpolator in the operator basis (along with the relevant scattering operators) in order to achieve a better resolution of the energy spectrum. Results show that inclusion of it has a moderate impact at physical charm quark mass.
Authors
Ivan Vujmilović
(Jozef Stefan Institute)
Sara Collins
Luka Leskovec
(Jozef Stefan Institute)
Emmanuel Ortiz Pacheco
(IJS)
Dr
Padmanath Madanagopalan
(The Institute of mathematical Sciences Chennai)
Sasa Prelovsek Komelj
