Model-Independent Results for SU(3) Violation in Twist-3 Light-Cone Distribution Functions
Jiunn-Wei Chen, Hung-Ming Tsai, Ke-Chuan Weng
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. 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 the distributions of pion, kaon and eta. We also comment on the calculations of the moments of these distributions using lattice QCD and light-cone sum rules.
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