Easy as π^<i>o</i>: on the interpretation of recent electroproduction results

Abstract

Exclusive $\\pi^o$ electroproduction from nucleons was first suggested by\nAhmad, Goldstein and Liuti for extracting from experimental data the tensor\ncharge, transversity and other quantities related to chiral odd combinations of\ngeneralized parton distributions. We now explain the details of the process:\n{\\it i)} the connection between the helicity description and the cartesian\nbasis; {\\it ii)} the dependence on the momentum transfer squared, $Q^2$, and\n{\\it iii)} the angular momentum, parity, and charge conjugation constraints\n($J^{PC}$ quantum numbers).\n