Scalar exotic mesons bbcc

Abstract

Properties of doubly charged scalar tetraquarks bbcc are investigated in the framework of the Quantum Chromodynamic (QCD) sum rule method. We model them as diquark-antidiquark states X 1 and X 2 built of axial-vector and pseudoscalar diquarks, respectively. The masses and current couplings of these particles are computed using the QCD two-point sum rule method. Results m(1) = (12715 +/- 80) MeV and m(2) = (13370 +/- 95) MeV obtained for the masses of these particles are used to determine their kinematically allowed decay modes. The full width Gamma(1 )of the state X-1 is evaluated by taking into account its strong decays to mesons 2B(c)(-) , and 2B(c)(*-) . The processes X-2 -> 2B(c)(-) , 2B(c)*- and Bc-Bc-(2S) are employed to estimate Gamma(2). Predictions obtained for the full widths Gamma(1) = (63 +/- 12) MeV and Gamma(2) = (79 +/- 14) MeV of these structures and their masses may be utilized in experimental studies of fully heavy resonances.