Perturbative pion form factor reexamined

1997/12/30 by David Tung, Hsiang-nan Li
Physics and Astronomy · #hep-ph

paper · pdf

published as Chin.J.Phys. 35 (1997) 651-662 · 16 pages in Latex file

arxiv created 1997/12/30 · arxiv updated 2009/11/30

Abstract

We recalculate the pion electromagnetic form factor based on the perturbative QCD formalism that includes the Sudakov resummation. We take into account the evolution of the pion wave function in b, which represents the transverse extent of the pion. An infrared enhancement is observed when 1/b approaches Λ_QCD. We propose to freeze the evolution of the wave function at some scale above Λ_QCD, such that perturbative contributions are stablized. Our predictions are consistent with experimental data, and insensitive to the variation of relevant parameters.

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