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We identify the newly found Z(4433) with the first radial excitation of the tetraquark basic supermultiplet to which X(3872) and X(3876) belong.
L. Maiani, F. Piccinini, A. D. Polosa and V. Riquer, Phys. Rev. Lett
2004
Earlier work this paper cites.
L. Maiani, F. Piccinini, A. D. Polosa and V. Riquer, Phys. Rev. D
2005
Earlier work this paper cites.
I. Bigi, L. Maiani, F. Piccinini, A. D. Polosa and V. Riquer, Phys. Rev. D
2005
Cited alongside, same era.
S. K. Choi et al. [Belle Collaboration], Phys. Rev. Lett
2006
Cited alongside, same era.
[Belle Collaboration], arXiv:0708.1790 [hep-ex]
Cited in the paper.
L. Maiani, A. D. Polosa and V. Riquer, arXiv:0707.3354 [hep-ph]
Cited in the paper.
G. Gokhroo et al., Phys. Rev. Lett
2007
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See e.g. R. Faccini in Lepton Photon 2007
2007
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