Speaker
Jakob Hoffmann
(Goethe University, Frankfurt)
Description
We refine our previous study of a $\bar{b}\bar{b}ud$ tetraquark resonance with quantum numbers $I(J^P) = 0(1^-)$ which is based on antistatic-antistatic-light-light lattice QCD potentials by including heavy quark spin effects via the mass difference of the $B$ and $B^\ast$ meson.
This leads to a coupled channel Schroedinger equation where the two channels correspond to $BB$ and $B^\ast B^ \ast$ respectively. We explore the existence of a tetraquark resonance by searching for $\mbox{T}$ matrix poles in the complex energy plane and find that the heavy quark spins have a significant impact. We also provide an outlook on a possible future finite volume scattering analysis of the same system carried out in full lattice QCD.
Primary author
Jakob Hoffmann
(Goethe University, Frankfurt)
Co-authors
Prof.
Marc Wagner
(Goethe University, Frankfurt)
Martin Pflaumer
(Goethe University, Frankfurt)
André Zimermmane
(DESY, Hamburg )
