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Magnetic moment of the pentaquark state $Θ^+(1540)$

Zhi-Gang Wang·Ri-Cong Hu
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Abstract

In this article, we study the magnetic moment of the pentaquark $ Θ^+(1540)$ as (scalar)diquark-(pseudoscalar)diquark-antiquark state with the QCD sum rules approach in the external electromagnetic field. Due to the special structure of the interpolating current, only the electromagnetic interactions of the $s$ quark with the external field have contributions to the magnetic moment with tensor structure $\{σ_{μν} {\hat p} +{\hat p}σ_{μν}\}$. The numerical results indicate the magnetic moment of the pentaquark state $ Θ^+(1540)$ is about $μ_{Θ^+}=(0.16\pm0.03)μ_N$.

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Zhi-Gang Wang, Ri-Cong Hu. 2005-07-12. Magnetic moment of the pentaquark state $Θ^+(1540)$. https://arxiv.org/abs/hep-ph/0504273

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