%0 Journal Article
%T On timelike and spacelike hard exclusive reactions
%A D. Mueller
%A B. Pire
%A L. Szymanowski
%A J. Wagner
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevD.86.031502
%X We show to next-to-leading order accuracy in the strong coupling alpha_s how the collinear factorization properties of QCD in the generalized Bjorken regime relate exclusive amplitudes for spacelike and timelike hadronic processes. This yields simple space--to--timelike relations linking the amplitudes for electroproduction of a photon or meson to those for photo- or meso-production of a lepton pair. These relations constitute a new test of the relevance of leading twist analyzes of experimental data.
%U http://arxiv.org/abs/1203.4392v3