Comparing meson-meson and diquark-antidiquark creation operators for a bar-b bar-b u d tetraquark

28 Jul 2021, 05:45
15m
Oral presentation Hadron Spectroscopy and Interactions Hadron Spectroscopy and Interactions

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)

Presentation materials