Searching for beauty-fully bound tetraquarks using lattice nonrelativistic QCD

This is the authors' abstract. We don't add key points for this paper.

Motivated by multiple phenomenological considerations, we perform the first search for the existence of a b̄b̄bb tetraquark bound state with a mass below the lowest noninteracting bottomonium-pair threshold using the first-principles lattice nonrelativistic QCD methodology. We use a full S-wave color/spin basis for the b̄b̄bb operators in the three 0⁺⁺, 1^+- and 2⁺⁺ channels. We employ four gluon field ensembles at multiple lattice spacing values ranging from a=0.06--0.12 fm, all of which include u, d, s and c quarks in the sea, and one ensemble which has physical light-quark masses. Additionally, we perform novel exploratory work with the objective of highlighting any signal of a near threshold tetraquark, if it existed, by adding an auxiliary potential into the QCD interactions. With our results we find no evidence of a QCD bound tetraquark below the lowest noninteracting thresholds in the channels studied.