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- W1417114399 abstract "Abstract We perform a proper analysis on the pion-photon transition form factor F πγ (Q 2 ) involvingthe transverse momentum corrections with the present CLEO experimental data, in which thecontributions beyond the leading Fock state have been taken into consideration. As is well-known,the leading Fock-state contribution dominates of the F πγ (Q 2 ) at the large Q 2 region. One shouldinclude the contributions beyond the leading Fock state in the small Q 2 region. In this paper,we construct a phenomenological expression to estimate the contributions beyond the leadingFock state based on the asymptotic behavior of the exact prediction at Q 2 → 0. Our presenttheoretical results agree well with the experimental data in the whole Q 2 region. Then, we extractsome useful information on the pionic twist-2 distribution amplitude by comparing our resultsof F πγ (Q 2 ) with the CLEO data. The best fit favors the asymptotic-like behavior of the pionwavefunction.PACS numbers: 13.40.Gp, 12.38.Bx, 12.39.Ki, 14.40.Aq" @default.
- W1417114399 created "2016-06-24" @default.
- W1417114399 creator A5065294592 @default.
- W1417114399 creator A5077184474 @default.
- W1417114399 date "2006-06-12" @default.
- W1417114399 modified "2023-09-25" @default.
- W1417114399 title "A Proper Analysis on the Pion-Photon Transition Form Factor Beyond the Leading Fock State" @default.
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- W1417114399 hasPublicationYear "2006" @default.
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