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

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

2005-04-28

arxiv.org/abs/hep-ph/0504273v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure, input parameters changed, add discussions

Scientific paper

In this article, we study the magnetic moment of the pentaquark $ \Theta^+(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 $\{\sigma_{\mu\nu} {\hat p} +{\hat p}\sigma_{\mu\nu}\}$. The numerical results indicate the magnetic moment of the pentaquark state $ \Theta^+(1540)$ is about $\mu_{\Theta^+}=(0.16\pm0.03)\mu_N$.

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