Electromagnetic form factors of the $Λ$ and $Σ$ baryons in an alternative baryonic current approach

Details Electromagnetic form factors of the $Λ$ and $Σ$ baryons in an alternative baryonic current approach Electromagnetic form factors of the $Λ$ and $Σ$ baryons in an alternative baryonic current approach

2009-06-10

arxiv.org/abs/0906.1935v1

Phys.Rev.D79:114031,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 14 figures, accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.79.114031

Light-cone sum rules are used to investigate the electromagnetic form factors of the $\Lambda$ and $\Sigma$ baryons by using the Ioffe type interpolating currents. The sum rules are affected to some extent by the choice of the interpolating currents from a comparison. Numerical calculations show that the magnetic form factor can be well fitted by the dipole formula for $\Sigma$ but not for $\Lambda$. The magnetic form factor of $\Lambda$ approaches zero with the momentum transfer faster than the dipole formula estimation.

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