https://doi.org/10.1140/epjc/s2005-02285-x
Theoretical Physics
Twist-3 distribution amplitudes of the pion and kaon from the QCD sum rules
1
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
* e-mail: huangtao@mail.ihep.ac.cn
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
