%0 Electronic Article
%A Abt, I.
%A Cooper-Sarkar, A. M.
%A Foster, B.
%A Myronenko, V.
%A Wichmann, K.
%A Wing, Matthew
%T Study of HERA ep Data at Low Q<sup>2</sup> and Low x<sub>Bj</sub> and the Need for Higher-Twist Corrections to Standard pQCD Evolution
%N DESY-16-064
%M PUBDB-2016-01811
%M DESY-16-064
%M arXiv:1604.02299
%D 2016
%X A detailed comparison of HERA data at low Bjorken-x and low four-momentum-transfer squared, Q<sup>2</sup>, with predictions based on lnQ<sup>2</sup> evolution (DGLAP) in perturbative Quantum Chromo Dynamics suggests inadequacies of this framework. The standard DGLAP evolution was augmented by including an additional higher-twist term in the description of the longitudinal structure function, F<sub>L</sub>. This additional term, F<sub>L</sub> A<sub>L</sub><sup>HT</sup>/Q<sup>2</sup>, improves the description of the reduced cross sections significantly. The resulting predictions for F<sub>L</sub> suggest that further corrections are required for Q<sup>2</sup> less than about 2 GeV<sup>2</sup>.
%K correction: higher-twist (autogen)
%K structure function: longitudinal (autogen)
%K quantum chromodynamics: perturbation theory (autogen)
%K DGLAP equation (autogen)
%K DESY HERA Stor (autogen)
%F PUB:(DE-HGF)25 ; PUB:(DE-HGF)15
%9 PreprintInternal Report
%U https://bib-pubdb1.desy.de/record/297267