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- W1520812255 abstract "We develop and discuss an infrared-finite factorization and optimized renormalization scheme for calculating exclusive processes which enables the inclusion of transverse degrees of freedom without entailing suppression of calculated observables, like form factors. This is achieved by employing an analytic, i.e., infrared stable, effective coupling $alpha_{s}(Q^{2})$ which removes the Landau singularity at $Q^{2}=Lambda_{rm QCD}^{2}$ by a power-behaved correction. The ensuing contributions to the cusp anomalous dimension, related to the Sudakov form factor, and to the quark anomalous dimension, which controls evolution, lead to enhancement of the hard part of exclusive amplitudes, calculated in perturbative QCD. The phenomenological implications of this framework are analyzed by applying it to the pion's electromagnetic form factor and the pion-photon transition." @default.
- W1520812255 created "2016-06-24" @default.
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- W1520812255 date "1998-12-08" @default.
- W1520812255 modified "2023-09-27" @default.
- W1520812255 title "Infrared-finite factorization and renormalization scheme for exclusive processes. Application to pion form factors" @default.
- W1520812255 hasPublicationYear "1998" @default.
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