Magnetic moment of the pentaquark $\Theta^+(1540)$ with QCD sum rules
  In this article, we study the magnetic moment of the pentaquark state $ \Theta^+(1540)$ with the QCD sum rules approach in the external electromagnetic field. The numerical results indicate the magnetic moment of the pentaquark state $ \Theta^+(1540)$ is about $\mu_{\Theta^+}=(0.24\pm0.02)\mu_N$. 
Zhi-Gang Wang (NCEPU), Wei-Min Yang (USTC), Shao-Long Wan (USTC)