Twist-3 distribution amplitudes of the pion and kaon from the QCD sum rules
CCAST(World Laboratory), P.O. Box 8730, 100080, Beijing, P.R. China
2 Institute of High Energy Physics, P.O. Box 918, 100039, Beijing, P.R. China
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Twist-3 distribution amplitudes of the pion and kaon are studied in this paper. We calculate the first several moments for the twist-3 distribution amplitudes ( and ) of the pion and kaon by applying the QCD sum rules. Our results show that (i) the first three moments of and the first two moments of and of the pion and kaon can be obtained with 30 uncertainty; (ii) the fourth moment of the and the second moment of the can be obtained when the uncertainty are relaxed to 35; (iii) the fourth moment of the can be obtained only when the uncertainty are relaxed to 40; (iv) we have and after including the -corrections to the perturbative part. These moments will be helpful for constructing the twist-3 wave functions of the pion and kaon.
© Springer-Verlag, 2005