Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Inclusion of heavy quark spin effects in the $I(J^{P})$=$0(1^{-})$ $ud\bar{b}\bar{b}$ four-quark channel in the Born-Oppenheimer approximation

Aug 9, 2022, 7:00 PM
Poster Presentation Hadron Spectroscopy and Interactions Poster


Jakob Hoffmann (Goethe University, Frankfurt)


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)


Prof. Marc Wagner (Goethe University, Frankfurt) Martin Pflaumer (Goethe University, Frankfurt) André Zimermmane (DESY, Hamburg )

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