Speaker
Sasa Prelovsek
(University of Ljubljana, Jozef Stefan Institute, University of Regensburg)
Description
Belle experiment discovered two tetraquark candidates $Z_b(10610)$ and $Z_b(10650)$ with flavor structure $\bar bb\bar du$ in 2011. We present the lattice study of the $\bar bb\bar du$ system in the approximation of static $b$ quarks. The ground and the excited eigenstates are extracted as a function of separation $r$ between $b$ and $\bar b$. The lower eigenstates at small $r$ are related to a bottomonium and a pion, where the pion is at rest or in flight. Some of the higher eigenstates are related to the $\bar BB^*$ system. We extract the interaction of the $\bar BB^*$ system and present results concerning possible $Z_b$ resonances or bound states in this channel.
Primary author
Sasa Prelovsek
(University of Ljubljana, Jozef Stefan Institute, University of Regensburg)
Co-authors
Huseyin Bahtiyar
(Mimar Sinan Fine Arts University, Jozef Stefan Institute)
Jan Petkovic
(Faculty of Mathematics and Physics & Jozef Stefan Institute)
