Searching for beauty-fully bound tetraquarks using lattice nonrelativistic QCD

Abstract

Using a data sample of (448.1±2.9)×106 ?(3686) events collected with the BESIII detector at the BEPCII collider, we present measurements of branching fractions for the decays ?cJ??+?- and ?0?0. The decays ?c1,2??+?- and ?0?0 are observed for the first time, and the branching fractions for ?c0??+?- and ?0?0 decays are measured with improved precision. The branching fraction ratios between the charged and neutral modes are consistent with the prediction of isospin symmetry. © 2018 authors.