Another tetraquark structure in the $π^+ χ_{c1}$ invariant mass distribution

Details Another tetraquark structure in the $π^+ χ_{c1}$ invariant mass distribution Another tetraquark structure in the $π^+ χ_{c1}$ invariant mass distribution

2008-07-29

arxiv.org/abs/0807.4592v6

Eur.Phys.J.C62:375-382,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 14 figure, correct some type errors

Scientific paper

10.1140/epjc/s10052-009-1043-x

In this article, we assume that there exists a scalar hidden charm tetraquark state in the $\pi^+ \chi_{c1}$ invariant mass distribution, and study its mass using the QCD sum rules. The numerical result $M_{Z}=(4.36\pm0.18) \rm{GeV}$ is consistent with the mass of the Z(4250). The Z(4250) may be a tetraquark state, other possibilities, such as a hadro-charmonium resonance and a $D_1^+\bar{D}^0+ D^+\bar{D}_1^0$ molecular state are not excluded.

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