# Tetraquark interpretation of the BELLE data on the anomalous $\Upsilon(1S) \pi^+\pi^-$ and $\Upsilon(2S) \pi^+\pi^-$ production near the $\Upsilon(5S)$ resonance

@inproceedings{Ali2009TetraquarkIO,
title={Tetraquark interpretation of the BELLE data on the anomalous \$\Upsilon(1S) \pi^+\pi^-\$ and \$\Upsilon(2S) \pi^+\pi^-\$ production near the \$\Upsilon(5S)\$ resonance},
author={Ahmed Farag Ali and Christian Hambrock and M. Jamil Aslam},
year={2009}
}
• Published 2009
• Physics
We analyze the Belle data [K. F. Chen et al. (Belle Collaboration), Phys. Rev. Lett. 100, 112001 (2008); I. Adachi et al. (Belle Collaboration), arXiv:0808.2445] on the processes ee → Υ(1S) ππ,Υ(2S) ππ near the peak of theΥ(5S) resonance, which are found to be anomalously large in rates compared to similar dipion transition s between the lower Υ resonances. Assuming these final states arise from the production and decays of the J = 1 stateYb(10890), which we interpret as a bound (diquark… Expand
1 Citations

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