Speaker
Prof.
Marc Wagner
(Goethe University Frankfurt)
Description
We compare two frequently discussed competing structures for a stable $\bar{b} \bar{b} u d$ tetraquark with quantum numbers $I(J^P) = 0(1^+)$ by considering meson-meson as well as diquark-antidiquark creation operators. We treat the heavy antiquarks as static with fixed positions and find diquark-antidiquark dominance for $\bar{b} \bar{b}$ separations $r < 0.25 \, \text{fm}$, while for $r > 0.50 \, \text{fm}$ the system essentially corresponds to a pair of B mesons. For the meson-meson to diquark-antidiquark ratio of the tetraquark we obtain around $60\%/40\%$.
Primary authors
Prof.
Marc Wagner
(Goethe University Frankfurt)
Pedro Bicudo
(IST Lisboa)
Dr
Antje Peters
(University of Muenster)
Sebastian Velten
(Goethe University Frankfurt)
