On a QCD-based pion distribution amplitude vs. recent experimental data

Details On a QCD-based pion distribution amplitude vs. recent experimental data On a QCD-based pion distribution amplitude vs. recent experimental data

2001-04-27

arxiv.org/abs/hep-ph/0104290v1

Conf.Proc.C010317:133-136,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages in moriond style; 1 photo and 2 figures unite 7 EPS files; to appear in Proc. of XXXIVth Rencontres de Moriond "QCD an

Scientific paper

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.

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