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| Dokumentenart: | Artikel |
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| Titel eines Journals oder einer Zeitschrift: | Physical Review D |
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| Verlag: | AMER PHYSICAL SOC |
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| Ort der Veröffentlichung: | COLLEGE PK |
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| Band: | 72 |
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| Nummer des Zeitschriftenheftes oder des Kapitels: | 11 |
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| Datum: | 2005 |
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| Institutionen: | Physik > Institut für Theoretische Physik |
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| Identifikationsnummer: | | Wert | Typ |
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| 10.1103/PhysRevD.72.114010 | DOI |
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| Stichwörter / Keywords: | QCD SUM-RULES; PION WAVE-FUNCTION; DISTRIBUTION AMPLITUDES; QUANTUM CHROMODYNAMICS; ASYMPTOTIC-BEHAVIOR; EXCLUSIVE PROCESSES; EVOLUTION-EQUATIONS; RESONANCE PHYSICS; VECTOR-MESONS; DISTRIBUTIONS; |
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| Dewey-Dezimal-Klassifikation: | 500 Naturwissenschaften und Mathematik > 530 Physik |
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| Status: | Veröffentlicht |
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| Begutachtet: | Ja, diese Version wurde begutachtet |
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| An der Universität Regensburg entstanden: | Ja |
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| Dokumenten-ID: | 70353 |
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Zusammenfassung
We reanalyze the gamma gamma(*)->pi(0) transition form factor F-pi gamma(Q(2)) within the QCD light-cone sum rules method with the twist-4 accuracy. In computations, the pion leading twist distribution amplitude (DA) with two nonasymptotic terms and the renormalon method-inspired twist-4 DAs are used. The latters allow us to estimate the impact of effects due to higher conformal spin components ...
Zusammenfassung
We reanalyze the gamma gamma(*)->pi(0) transition form factor F-pi gamma(Q(2)) within the QCD light-cone sum rules method with the twist-4 accuracy. In computations, the pion leading twist distribution amplitude (DA) with two nonasymptotic terms and the renormalon method-inspired twist-4 DAs are used. The latters allow us to estimate the impact of effects due to higher conformal spin components in the pion twist-4 DAs on the form factor F-pi gamma(Q(2)). Obtained theoretical predictions are employed to deduce constraints on the pion DAs from CELLO and CLEO data.
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