Possible tetraquark states in the $π^+ χ_{c1}$ invariant mass distribution

Details Possible tetraquark states in the $π^+ χ_{c1}$ invariant mass distribution Possible tetraquark states in the $π^+ χ_{c1}$ invariant mass distribution

2008-07-16

arxiv.org/abs/0807.2581v5

Eur. Phys. J.C59:675-681, 2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 4 figures

Scientific paper

10.1140/epjc/s10052-008-0812-2

In this article, we assume that there exist hidden charmed tetraquark states with the spin-parity $J^P=1^-$, and calculate their masses with the QCD sum rules. The numerical result indicates that the masses of the vector hidden charmed tetraquark states are about $M_{Z}=(5.12\pm0.15) \rm{GeV}$ or $M_{Z}=(5.16\pm0.16) \rm{GeV}$, which are inconsistent with the experimental data on the $\pi^+ \chi_{c1}$ invariant mass distribution. The hidden charmed mesons $Z_1$, $Z_2$ or $Z$ may be scalar hidden charmed tetraquark states, hadro-charmonium resonances or molecular states.

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