T bbb : A three B -meson bound state

摘要

By solving exactly the Faddeev equations for the bound-state problem of three mesons, we demonstrate that current theoretical predictions pointing to the existence of a deeply-bound doubly bottom axial vector tetraquark lead to the existence of a unique bound state of threeBmesons. We find that theBB?B??B?B?B?state with quantum numbers(I)JP=(1/2)2?,Tbbb, is about 90?MeV below any possible threeB-meson threshold for the reported binding of the doubly bottom axial vector tetraquark,Tbb.