Magnetic moment of the pentaquark state Θ⁺(1540)

2005/04/28 by Zhi-Gang Wang, Wang, Zhi-Gang, Ri-Cong Hu +1
Chemistry · Physics and Astronomy · #Advanced NMR Techniques and Applications #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0504273

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

arxiv created 2005/07/12 · arxiv updated 2009/12/01

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 p + pσ_μν\. The numerical results indicate the magnetic moment of the pentaquark state Θ⁺(1540) is about μ_Θ⁺=(0.16±0.03)μ_N.

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