https://doi.org/10.1140/epjc/s10052-017-4764-2
Regular Article - Theoretical Physics
processes with twist-3 corrections in QCD
1
School of Physical Science and Technology, Southwest University, Chongqing, 400715, People’s Republic of China
2
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China
* e-mail: zhoumz@swu.edu.cn
Received:
11
October
2016
Accepted:
19
March
2017
Published online:
6
April
2017
We study the processes with the contributions from the two-particle twist-2 and twist-3 distribution amplitudes of pion and kaon mesons on BHL prescription in the standard hard-scattering approach. The results show that the contributions from twist-3 parts are actually not power suppressed compared with the leading-twist contributions in the low energy region. The cross sections with twist-3 corrections agree well with the experimental data in the two-photon center-of-mass energy 
GeV and we also predict the cross section ratio 
, which is compatible with the experimental data from TPC and Belle.
© The Author(s), 2017
