Beauty-full tetraquarks

In this article we present a calculation of the bb (b) over bar(b) over bar btetraquark ground-state energy using a diffusion Monte Carlo method to solve the non-relativistic many-body system. The static potential for the four quark system is chosen to align with the flux-tube picture of QCD. Using this approach, we find that the 0(++) state has a mass of 18.69 +/- 0.03 GeV, which is around 100 MeV below twice the.bmass. This bound state can behave as a four-lepton resonance via its decay to gamma(1S)gamma(1S)* -> l(+)l(-) l(+)l(-). (C) 2019 The Authors. Published by Elsevier B.V.