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Gluonic excitation of non-exotic hybrid charmonium from lattice QCD · arXivDesk

hep-lat/0512044Dec 30, 2005Different analysis methods were used for a cross check, leading to consistent results

Gluonic excitation of non-exotic hybrid charmonium from lattice QCD

Xiang-Qian Luo, Yan Liu

Lattice Phenomenology

Abstract

The ground and first excited states of the hybrid charmonium ${\bar c} c g$ , with non-exotic quantum numbers $J^{PC}=0^{-+}$ , $1^{--}$

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and

1^{++}

are investigated using quenched lattice QCD. They are completely ignored in the literature, only because their ground states are degenerate with

η_c

,

D_s

, and

χ_{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.

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