The meson Z+ (4430) as a tetraquark state

M. E. Bracco, S. H. Lee, M. Nielsen, R. Rodrigues da Silva

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44 Citations (Scopus)


We test the validity of the QCD sum rules applied to the meson Z+ (4430), by considering a diquark-antidiquark type of current with JP = 0- and with JP = 1-. We find that, with the studied currents, it is possible to find an acceptable Borel window. In such a Borel window we have simultaneously a good OPE convergence and a pole contribution which is bigger than the continuum contribution. We get mZ = (4.52 ± 0.09)   GeV and mZ = (4.84 ± 0.14)   GeV for the currents with JP = 0- and JP = 1-, respectively. We conclude that the QCD sum rules results favors JP = 0- quantum numbers for the Z+ (4430) meson.

Original languageEnglish
Pages (from-to)240-244
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number2
Publication statusPublished - 2009 Jan 19

Bibliographical note

Funding Information:
This work has been partly supported by FAPESP and CNPq-Brazil, and by the Korea Research Foundation KRF-2006-C00011.

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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