Regular Article - Theoretical Physics
Light-cone QCD sum rules for the Λ baryon electromagnetic form factors and its magnetic moment
Department of Physics, National University of Defense Technology, Hunan, 410073, China
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Revised: 10 February 2009
Published online: 14 March 2009
We present the light-cone QCD sum rules up to twist 6 for the electromagnetic form factors of the Λ baryon. To estimate the magnetic moment of the baryon, the magnetic form factor is fitted by the dipole formula. The numerical value of our estimation is μ Λ =−(0.64±0.04)μ N , which is in accordance with the experimental data and the existing theoretical results. We find that it is twist 4 but not the leading twist distribution amplitudes that dominate the results.
© Springer-Verlag, 2009