EPJ Web Conf.
Volume 113, 201621st International Conference on Few-Body Problems in Physics
|Number of page(s)||4|
|Published online||25 March 2016|
Pseudoscalar mesons parton distribution amplitudes
1 Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
2 Institute for Theoretical Physics and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
3 Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Nanjing University, Nanjing 210093, China
4 Department of Physics, Nanjing University, Nanjing 210093, China
Published online: 25 March 2016
We compute all kaon and pion parton distribution amplitudes (PDAs) to twist-three and find that all of the pion’s distributions are symmetric and all of the kaon’s distributions are skewed in favour of the heavier s-quark, which are clear signals of dynamical chiral symmetry breaking (DCSB). And we can also notice that only the pseudotensor PDA can reasonably be approximated by its conformal limit. At any realistic energy scale, the pseudovector and pseudoscalar PDAs differ markedly from the corresponding functions in QCD’s conformal limit. We can use these PDAs as the inputs to study hard exclusive processes and get trustable results.
© Owned by the authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.