Abstract
We study the large momentum transfer behaviour of the pion electromagnetic form factor in the spacelike region in terms of a Minkowski-space generalized perturbative integral representation for the covariant, gauge-invariant q q pion wave function. In particular, we focus on the magnitude of the leading (twist-2) perturbative QCD contribution compared to the model nonperturbative contributions. We find that at intermediate values of Q 2( i. e., Q 2≅5 GeV 2) the nonperturbative contribution has a magnitude comparable to the pure perturbative QCD one. We conclude that perturbative QCD cannot be expected to be reliable for this form factor at intermediate Q 2.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
