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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 · ORCID
classification hep-ph
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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  1. Next-to-leading-order time-like rho electromagnetic form factors in ${k_{\rm T}}$ factorization

    hep-ph 2025-01 conditional novelty 5.0 of 10

    The NLO time-like rho meson electromagnetic form factors are obtained by analytic continuation of space-like NLO results, with twist-3 contributions dominating and predictions consistent with BABAR.

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