On a QCD-based pion distribution amplitude vs. recent experimental data
摘要
Using QCD sum rules with nonlocal condensates the twist-2 pion distribution amplitude is determined by means of its moments and their confidence intervals, including also radiative corrections. An admissible set of pion distribution amplitudes is constructed in the a_2, a_4 plane of the Gegenbauer polynomial expansion coefficients. The determined a_2, a_4 region strongly overlaps with that extracted from the CLEO data by Schmedding and Yakovlev. Comparisons are given with results from Fermilab experiment E791 and recent lattice calculations.
关键词
引用
@article{arxiv.hep-ph/0104290,
title = {On a QCD-based pion distribution amplitude vs. recent experimental data},
author = {A. P. Bakulev and S. V. Mikhailov and N. G. Stefanis},
journal= {arXiv preprint arXiv:hep-ph/0104290},
year = {2008}
}
备注
4 pages in moriond style; 1 photo and 2 figures unite 7 EPS files; to appear in Proc. of XXXIVth Rencontres de Moriond "QCD and High Energy Hadronic Interactions", March 17 to 24, 2001, Les Arcs, Savoie, France