THE KAON ELECTROMAGNETIC FORM FACTOR AND EFFECTS OF RUNNING COUPLING CONSTANT

The Borel transform and resummed expression for the kaon electromagnetic form factor F_k(Q²) are obtained in the context of QCD running coupling α_s(Q²(1 − x)(1 − y)) approach. It is demonstrated that the effects of running coupling (ir renormalons) can be taken into account by scale-setting procedure α_s(Q²)→α_s(e^{f (Q2)}Q²) in the leading order expression.