Space- and time-like electromagnetic pion form factors in light-cone pQCD

Hiroaki Kohyama; Jiunn-Wei Chen; Kazuaki Ohnishi; Udit Raha; Yue-Long Shen

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Space- and time-like electromagnetic pion form factors in light-cone pQCD

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arxiv 0908.2973 v2 pith:IRZIGGJP submitted 2009-08-20 hep-ph

Jiunn-Wei Chen , Hiroaki Kohyama , Kazuaki Ohnishi , Udit Raha , Yue-Long Shen This is my paper

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keywords pionspace-time-likedataelectromagneticexperimentalfactorsform

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We present a combined analysis of the space- and time-like electromagnetic pion form factors in light-cone perturbative QCD with transverse momentum dependence and Sudakov suppression. Including the non-perturbative ``soft' QCD and power suppressed twist-3 corrections to the standard twist-2 perturbative QCD result, the experimental pion data available at moderate energies/momentum transfers can be explained reasonably well. This may help towards resolving the bulk of the existing discrepancy between the space- and time-like experimental data.

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