Renormalon Model of Twist-4 Corrections to the Pion Distribution Amplitude

Abstract

In this paper we describe a renormalon-inspired model of twist--4 power corrections to the light-cone pion distribution amplitude, and compare it to the results obtained using the conformal wave expansion. We find that the overall functional form predicted in this renormalon model is similar to the one predicted in the standard approach to higher twist contributions involving an expansion in conformal operators. However, small discrepancies at the end-points allow for a discussion on the convergence properties of the conformal expansion.

Uses feynmp. Revised version published in PLB

Cited by in corpus (9)

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• Search for isotensor exotic meson and twist 4 contribution to ${\gamma }^{\ast }\gamma \to \rho \rho$
• Impact of the higher twist effects on the $\gamma {\gamma }^{\ast }\to {\pi }^0$ transition form factor
• Renormalon approach to higher-twist distribution amplitudes and the convergence of the conformal expansion
• Higher twist distribution amplitudes of the pion and electromagnetic form factor $F_{\pi }(Q^2)$
• Pion distribution amplitude from holographic QCD and the electromagnetic form factor F_pi(Q2)