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Magnetic moment of the pentaquark $Θ^+(1540)$ as diquark-diquark-antiquark state with QCD sum rules

Zhi-Gang Wang·Shao-Long Wan·Wei-Min Yang
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Abstract

In this article, we study the magnetic moment of the pentaquark state $ Θ^+(1540)$ as diquark-diquark-antiquark ($[ud][ud]\bar{s}$) state with the QCD sum rules in the external weak electromagnetic field (EFSR) and the light-cone QCD sum rules (LCSR) respectively. The numerical results indicate the magnetic moment is about $μ_{Θ^+}=-(0.11\pm 0.02)μ_N$ for the EFSR and $μ_{Θ^+}\approx-(0.1-0.5)μ_N$ for the LCSR. As the values obtained from the EFSR are more stable than the corresponding ones from the LCSR, $μ_{Θ^+}=-(0.11\pm 0.02)μ_N$ is more reliable.

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Zhi-Gang Wang, Shao-Long Wan, Wei-Min Yang. 2005-06-27. Magnetic moment of the pentaquark $Θ^+(1540)$ as diquark-diquark-antiquark state with QCD sum rules. https://doi.org/10.1140/epjc%2Fs2005-02400-1

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