Hybrid Charmonium and the $ρ-π$ Puzzle

Details Hybrid Charmonium and the $ρ-π$ Puzzle Hybrid Charmonium and the $ρ-π$ Puzzle

2008-05-13

arxiv.org/abs/0805.1943v2

Adv.High Energy Phys.2009:982341,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 7 figures

Scientific paper

10.1155/2008/982341

Using the method of QCD Sum Rules, we estimate the energy of the lowest hybrid Charmonium state, and find it to be at the energy of the $\Psi'(2S)$ state, about 600 Mev above the $J/\Psi(1S)$ state. Since our solution is not consistent with a pure hybrid at this energy, we conclude that the $\Psi'(2S)$ state is probably an admixed $c \bar{c}$ and hybrid $c \bar{c}g$ state. From this conjecture we find a possible explanation of the famous $\rho-\pi$ puzzle.

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