Lattice QCD study of heavy-heavy-light-light tetraquark candidates

Abstract

We investigate heavy-light four-quark systems $ud\bar{b}\bar{b}$ with bottom quarks of finite mass which are treated in the framework of NRQCD. We focus on $I(J^P)=0(1^{+})$, where we recently found evidence for the existence of a tetraquark state using static bottom quarks. Furthermore, we report on an investigation of the $u\bar{d}b\bar{b}$ four-quark system with quantum numbers $I(J^P)=1(1^{+})$ again using static bottom quarks.

Comments: 6 pages, 2 figures, presented at the 34th International Symposium on Lattice Field Theory, 24-30 July 2016, Highfield Campus, University of Southampton, Southampton, UK