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

  • Z. G. WangEmail author
  • S. L. Wan
  • W. M. Yang
Theoretical Physics

Abstract.

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

Keywords

Field Theory Elementary Particle Quantum Field Theory Electromagnetic Field Particle Acceleration 
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Copyright information

© Springer-Verlag Berlin/Heidelberg 2006

Authors and Affiliations

  1. 1.Department of PhysicsNorth China Electric Power UniversityBaodingP.R. China
  2. 2.Department of Modern PhysicsUniversity of Science and Technology of ChinaHefeiP.R. China

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