Tensor hybrid charmonia

Abstract

The mass and current coupling of the tensor hybrid charmonia Hc and Hc with quantum numbers JPC 1/4 2-+ and 2++, as well as their full widths, are calculated in the context of the QCD sum rule method. The spectral parameters of these states are computed using the QCD two-point sum rule approach including dimension-12 terms similar to hg3 sG3i2. The full decay widths of the charmonia Hc and Hc are evaluated by considering their kinematically allowed decay channels. In the case of the hybrid state Hc, decays to D(*)D*(-/+), D0D*0, and D(*) s D*(-/+) s mesons are taken into account. The processes Hc-D(*)+D(*)-, D(*)0D(*)0, and D(*)+ s D(*)- s are employed to estimate the full width of the hybrid charmonium Hc. The partial widths of these decays are computed by means of the QCD three-point sum rule method, which is necessary to calculate strong couplings at the relevant hybrid-meson-meson vertices. Our predictions m 1/4 (4.16 +/- 0.14) GeV and m 1/4 (4.5 +/- 0.1) GeV for the masses and Gamma 1/2Hc 1/4 (160 +/- 30) MeV and Gamma 1/2 various resonances in the 4-5 GeV mass range. Hc 1/4 (206 +/- 33) MeV for the full width of these hybrid charmonia can be useful to study and interpret