Transversity via Exclusive pi0 Electroproduction
arXiv:0810.2128 · doi:10.1142/9789814277785_0011
Abstract
Exclusive pi0 electroproduction from nucleons can be related to transversity, the tensor charge, and other quantities related to transversity. This process isolates C-parity odd and chiral odd combinations of t-channel exchange quantum numbers. In a hadronic picture the meson production amplitudes for intermediate energy and Q are determined by C-odd Regge exchanges with final state interactions. The helicity structure for this C-odd process relates to the quark helicity flip, or chiral odd generalized parton distributions (GPDs).Various cross sections and asymmetries will be sensitive to the transversity.
10 pages, 3 figures, presented at Transversity 2008, Second International Workshop on Transverse Polarization Phenomena in Hard Processes, Ferrara, Italy, May 28-31, 2008 Corrected references