Hadronic parameters of χ_(c1)(1P) and first radially excited state χ_(c1)(2P)

摘要

We investigate the ground-state heavy quarkonium χ_(c1)(1P) and its first radial excited state χ_(c1)(2P) with the same quantum number J~(PC) = 1~(++). The mass and decay constant of the χ_(c1)(1P) and χ_(c1)(2P) states are evaluated using two-point formalism of QCD sum rule method including quark, gluon and mixed condensates up to dimension eight. Later, we compared our numerical results with the available experimental data as well as existing theoretical predictions in the literature. We hope that our findings can be verified with the next generation experiments in the near future.