Chiral-odd GPDs in large-Nc QCD
Abstract
We study the flavor structure of the nucleon's chiral-odd generalized parton distributions (transversity GPDs) in the large-Nc limit of QCD. It is found that in the distributions HT and ET-tilde the flavor-nonsinglet component u - d is leading in the 1/Nc expansion, while in ET and HT-tilde it is the flavor-singlet component u + d. This pattern is consistent with the flavor structure extracted from hard exclusive pi0 and eta electroproduction data, assuming that the processes are dominated by the twist-3 mechanism involving the chiral-odd pseudoscalar meson distribution amplitudes.
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