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arXiv · hep-ph/9601356

IR-Renormalon Contribution to the Longitudinal Structure Function $F_L$

E. Stein·M. Meyer-Hermann·L. Mankiewicz·A. Schäfer
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Abstract

The available data on $F_L$ suggest the existence of unexpected large higher twist contributions. We use the $1/N_f$ expansion to analyze the renormalon contribution to the coefficient function of the longitudinal structure function $F_L^{p-n}$. The renormalon ambiguity is calculated for all moments of the structure function thus allowing to estimate the contribution of ``genuine'' twist-4 corrections as a function of Bjorken-$x$. The predictions turn out to be in surprisingly good agreement with the experimental data.

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E. Stein, M. Meyer-Hermann, L. Mankiewicz, A. Schäfer. 1996-01-30. IR-Renormalon Contribution to the Longitudinal Structure Function $F_L$. https://doi.org/10.1016/0370-2693(96)00275-4

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