Diffusion Monte Carlo calculations of fully heavy compact hexaquarks

Abstract

We used a diffusion Monte Carlo technique to describe the properties of fully heavy compact arrangements (no dibaryon molecules) including six quarks and no antiquarks within the framework of a constituent quark model. Only arrangements whose wavefunctions were eigenvectors of with eigenvalue were taken into account, what means that we only considered the subset of all the possible color-spin combinations that make the total wavefunctions antisymmetric with respect to the interchange of any two quarks of the same type. In all cases, the masses of the six-quark arrangements are larger than the ones corresponding to the sum of any of the two baryons we can split them into, but smaller than the ones for a set of six isolated quarks, i.e., all them are bound systems. The analysis of their structure indicates that all the hexaquarks considered in this work are compact objects, except the , that appears to be a loose association of two baryons for all the possible spin values.