Pion Form Factors with Improved Infrared Factorization
نویسنده
چکیده
We calculate electromagnetic pion form factors with an analytic model for αs(Q 2) which is infrared (IR) finite. We show that for the asymptotic pion distribution amplitude Fπ0γ∗γ agrees with the data, whereas the IR-enhanced hard contribution to Fπ and the soft part can jointly account for the data. 12.38.Bx, 12.38.Cy, 12.38.Lg, 13.40.Gp Typeset using REVTEX ∗Email: [email protected] †also Fachbereich Physik, Universität Wuppertal, D-42097 Wuppertal, Germany ‡Email: [email protected] §Email: [email protected]
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تاریخ انتشار 1999