Model-Independent Results for SU(3) Violation in Twist-3 Light-Cone Distribution Functions

Abstract Using chiral symmetry we investigate the leading SU(3) violation in the complete set of quark twist-3 light-cone distribution functions of the pion, kaon, and eta, including the two-parton distributions φpM , φ σ M , and the three-parton distribution φ 3 M . It is shown that terms non-analytic in the quark masses do not affect the shape, and only appear in the normalization constants. Predictive power is retained including the leading analytic mq operators. With the symmetry violating corrections we derive useful model-independent relations between φ π , φ p,σ,3 η , φ p,σ,3 K+,K0 , and φ K̄0,K− . We also comment on the calculations of the moments of these distributions using lattice QCD and light-cone sum rules.