Proof of factorization for electroproduction of multiple mesons and exclusive ${\gamma }^{\ast }\gamma$ production of multiple hadrons

Abstract

In the following, we will present a generalization of the proof of factorization for electroproduction of vector mesons to the production of several mesons such as ${\pi }^{+}{\pi }^{-}$ and a proof of factorization for exclusive ${\gamma }^{\ast }\gamma$ production of several hadrons for example $p\bar{p}$ or ${\pi }^{+}{\pi }^{-}$ to all orders in perturbation theory up to power suppressed terms.

Comments: 16 pages, 5 figures, uses revtex, final version. to be published in Phys. Rev. D