Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2005-12-30
Phys.Rev. D74 (2006) 034502; Erratum-ibid. D74 (2006) 039902
Physics
High Energy Physics
High Energy Physics - Lattice
Different analysis methods were used for a cross check, leading to consistent results
Scientific paper
10.1103/PhysRevD.74.034502
The ground and first excited states of the hybrid charmonium ${\bar c} c g$, with non-exotic quantum numbers $J^{PC}=0^{-+}$, $1^{--}$ and $1^{++}$ are investigated using quenched lattice QCD. They are completely ignored in the literature, only because their ground states are degenerate with $\eta_c$, $J/\psi$, and $\chi_{c1}$, and are difficult to be distinguished from these conventional charmonium mesons in experiment. However, we observe strong gluonic radial excitations in the first excited states; We predict that their masses are 4.352(225)GeV, 4.379(149)GeV and 7.315(257)GeV, completely different from the first excited states of the corresponding conventional charmonium. Their relevance to the recent discovery of the Y(4260) state and future experimental search for other states are also discussed.
Liu Yan
Luo Xiang-qian
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