ar X iv : 0 70 4 . 37 82 v 1 [ he p - ph ] 2 8 A pr 2 00 7 Resummation of Large Logarithms in γ ∗ π 0 → γ

Abstract

In the collinear factorization of the form factor for the transition γ * π 0 → γ the hard part contains double log terms as ln 2 x with x as the momentum fraction of partons from 0 to 1. A simple exponentiation for resummation leads to divergent results. We study the resummation of these ln 2 x terms. We show that the ln 2 x terms come partly from the light… (More)

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@inproceedings{FengarXI, title={ar X iv : 0 70 4 . 37 82 v 1 [ he p - ph ] 2 8 A pr 2 00 7 Resummation of Large Logarithms in γ ∗ π 0 → γ}, author={Feng Feng and Jinwen Ma and Q. Wang} }