Disentangling positivity constraints for generalized parton distributions

P. V. Pobylitsa

Published 2002-01-06, updated 2002-06-10Version 3

Positivity constraints are derived for the generalized parton distributions (GPDs) of spin-1/2 hadrons. The analysis covers the full set of eight twist-2 GPDs. Several new inequalities are obtained which constrain GPDs by various combinations of usual (forward) unpolarized and polarized parton distributions including the transversity distribution.