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

  • Theoretical Physics
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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.

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Authors and Affiliations

  1. Department of Physics, North China Electric Power University, 071003, Baoding, P.R. China

    Z. G. Wang

  2. Department of Modern Physics, University of Science and Technology of China, 230026, Hefei, P.R. China

    S. L. Wan & W. M. Yang

Authors
  1. Z. G. Wang
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  2. S. L. Wan
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  3. W. M. Yang
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Correspondence to Z. G. Wang.

Additional information

Received: 29 March 2005, Revised: 28 June 2005, Published online: 21 October 2005

PACS:

12.38.Aw, 12.38.Lg, 12.39.Ba, 12.39.-x

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Wang, Z.G., Wan, S.L. & Yang, W.M. Magnetic moment of the pentaquark Θ+(1540) as diquark-diquark-antiquark state with QCD sum rules. Eur. Phys. J. C 45, 201–209 (2006). https://doi.org/10.1140/epjc/s2005-02400-1

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