End-point behavior of the pion distribution amplitude

Details End-point behavior of the pion distribution amplitude End-point behavior of the pion distribution amplitude

2010-10-22

arxiv.org/abs/1010.4711v3

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 5 figures, 3 tables, invited talk given by the second author at "QUARKS-2010, 16th International Seminar on High Ene

Scientific paper

We discuss the end-point behavior of the pion distribution amplitude (DA) and calculate its slope using QCD sum rules with nonlocal condensates. This is done in terms of the standard derivative and also with the help of an "integral derivative", recently obtained by us. Our approach favors a value of the slope of the order (or less) of the asymptotic DA and is in clear disagreement with flat-type pion DAs.

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