Leptonic decays of D-wave vector quarkonia

FAIRNESS 2016

Krassnigg, A.^1 ; Gomez-Rocha, M.^2 ; Hilger, T.^1

Institute of Physics, University of Graz, NAWI Graz, Graz

A-8010, Austria^1

ECT, Villa Tambosi, Villazzano, Trento

38123, Italy^2

关键词: Bethe-Salpeter equation;    Decay constants;    Decay widths;    Leptonic decay;    Quark model;    Vector channels;    Wave state;    Wave vector;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/742/1/012032/pdf
DOI  :  10.1088/1742-6596/742/1/012032

来源: IOP

【 摘 要 】

We give a short and basic introduction to our covariant Dyson-Schwinger-Bethe- Salpeter-equation approach using a rainbow-ladder truncated model of QCD, in which we investigate the leptonic decay properties of heavy quarkonium states in the pseudoscalar and vector channels. Comparing the magnitudes of decay constants, we identify radial 1- -excitations in our calculation with experimental excitations of J/ψ and ϒ. Particular attention is paid to those states regarded as D-wave states in the quark model. We predict e+e--decay width of the ϒ(13D1) and ϒ(23D1) states of the order of ≈ 15 eV or more. We also provide a set of predictions for decay constants of pseudoscalar radial excitations in heavy quarkonia.