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

E. Stein; M. Meyer-Hermann; L. Mankiewicz; A. Schäfer

doi:10.1016/0370-2693(96)00275-4

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

High Energy Physics - Phenomenology 2009-10-28 v2

Authors: 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.

Keywords

proton structure

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@article{arxiv.hep-ph/9601356,
  title  = {IR-Renormalon Contribution to the Longitudinal Structure Function $F_L$},
  author = {E. Stein and M. Meyer-Hermann and L. Mankiewicz and A. Schäfer},
  journal= {arXiv preprint arXiv:hep-ph/9601356},
  year   = {2009}
}

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12 pages, latex, including 1 figure, revised version with two reference added, no changes to the paper

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

Abstract

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