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

Abstract

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 ${\mu }_{\Lambda }=-(0.64\pm 0.04){\mu }_N$, 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.

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

References in corpus (11)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Determination of the Charged Pion Form Factor at Q2=1.60 and 2.45 (GeV/c)2
• Precision Rosenbluth measurement of the proton elastic form factors
• Measurements of electron-proton elastic cross sections for $0.4<Q^2<5.5(GeV/c{)}^2$
• Determination of the pion charge form factor for Q^2=0.60-1.60 GeV^2
• Nucleon Form Factors in QCD
• Improved Light-Cone Sum Rules for the Electromagnetic Form Factors of the Nucleon
• Light-cone QCD sum rules for the semileptonic decay Lambda_b --> p lepton anti-neutrino
• Measurements of the Generalized Electric and Magnetic Polarizabilities of the Proton at Low Q2 Using the VCS Reaction
• Electric and magnetic form factors of strange baryons
• Magnetic moments of octet baryons and sea antiquark polarizations

Cited by in corpus (12)

• Distribution amplitudes of $\Sigma$ and $\Lambda$ and their electromagnetic form factors
• The Nucleon Distribution Amplitudes and their application to nucleon form factors and the $N\to \Delta$ transition at intermediate values of $Q^2$
• Improved analysis on the semi-leptonic decay ${\Lambda }_c\to \Lambda {\ell }^{+}\nu$ from QCD light-cone sum rules
• Light-cone Distribution Amplitudes of Xi and their Applications
• Electromagnetic form factors of the $\Lambda$ and $\Sigma$ baryons in an alternative baryonic current approach
• Analysis of the semileptonic decay Λ_c->ne^+ν_e
• Higher order light-cone distribution amplitudes of the Lambda baryon
• Electromagnetic form factors of ${\Lambda }_b$ in the Bethe-Salpeter equation approach
• Higher Order Corrections to the Light-cone Distribution Amplitudes of the Sigma baryon
• Sea contribution to the charge radii and quadrupole moment of $J^P={\frac{1}{2}}^{+},{\frac{3}{2}}^{+}$ baryons
• Electromagnetic form factors of ${\Lambda }_c$ in the Bethe-Salpeter equation approach
• Light-cone distribution amplitudes of the nucleon and $\Delta$ baryon