Light-cone QCD Sum Rules for the $Λ$ Baryon Electromagnetic Form Factors and its magnetic moment

Details Light-cone QCD Sum Rules for the $Λ$ Baryon Electromagnetic Form Factors and its magnetic moment Light-cone QCD Sum Rules for the $Λ$ Baryon Electromagnetic Form Factors and its magnetic moment

2008-10-28

arxiv.org/abs/0810.4973v2

Eur.Phys.J.C60:593-601,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 page, 7 figures, accepted for publication in Euro. Phys. J. C

Scientific paper

10.1140/epjc/s10052-009-0971-9

We present the light-cone QCD sum rules up to twist 6 for the electromagnetic form factors of the $\Lambda$ 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 $\mu_\Lambda=-(0.64\pm0.04)\mu_N$, 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.

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