Perturbative QCD Analysis of the Nucleon's Pauli Form Factor F₂(Q²)

الأصل · EN

We perform a perturbative QCD analysis of the nucleon's Pauli form factor F₂(Q²) in the asymptotically large Q² limit. We find that the leading contribution to F₂(Q²) has a 1/Q⁶ power behavior, consistent with the well-known result in the literature. Its coefficient depends on the leading- and subleading-twist light-cone wave functions of the nucleon, the latter describing the quarks with one unit of orbital angular momentum. We also derive at the logarithmic accurary the asymptotic scaling F₂(Q²)/F₁(Q²) (² Q²/Λ²)/Q² which describes recent Jefferson Lab data well.