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Distribution amplitudes of Σ and Λ and their electromagnetic form factors

✍ Scribed by Yong-Lu Liu; Ming-Qiu Huang

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
320 KB
Volume
821
Category
Article
ISSN
0375-9474

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✦ Synopsis

Based on QCD conformal partial wave expansion to leading order conformal spin accuracy, we present the light-cone distribution amplitudes (DAs) of Σ and Λ baryons up to twist 6. It is concluded that fourteen independent DAs are needed to describe the valence three-quark states of the baryons at small transverse separations. The nonperturbative parameters relevant to the DAs are determined within the framework of QCD sum rule method. With the obtained DAs, a simple investigation on the electromagnetic form factors of these baryons are given. The magnetic moments of the baryons are estimated by fitting the magnetic form factor with the dipole formula.

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