The meson Z+ (4430) as a tetraquark state

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

doi:10.1016/j.physletb.2008.12.021

The meson Z⁺ (4430) as a tetraquark state

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

We test the validity of the QCD sum rules applied to the meson Z⁺ (4430), by considering a diquark-antidiquark type of current with J^P = 0^- and with J^P = 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 m_Z = (4.52 ± 0.09) GeV and m_Z = (4.84 ± 0.14) GeV for the currents with J^P = 0^- and J^P = 1^-, respectively. We conclude that the QCD sum rules results favors J^P = 0^- quantum numbers for the Z⁺ (4430) meson.

Original language	English
Pages (from-to)	240-244
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	671
Issue number	2
DOIs	https://doi.org/10.1016/j.physletb.2008.12.021
Publication status	Published - 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

Access to Document

10.1016/j.physletb.2008.12.021

Cite this

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title = "The meson Z+ (4430) as a tetraquark state",

abstract = "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.",

author = "Bracco, {M. E.} and Lee, {S. H.} and M. Nielsen and {da Silva}, {R. Rodrigues}",

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

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doi = "10.1016/j.physletb.2008.12.021",

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T1 - The meson Z+ (4430) as a tetraquark state

AU - Bracco, M. E.

AU - Lee, S. H.

AU - Nielsen, M.

AU - da Silva, R. Rodrigues

N1 - Funding Information: This work has been partly supported by FAPESP and CNPq-Brazil, and by the Korea Research Foundation KRF-2006-C00011.

PY - 2009/1/19

Y1 - 2009/1/19

N2 - 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.

AB - 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.

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