TY  - EJOUR
AU  - Abt, I.
AU  - Cooper-Sarkar, A. M.
AU  - Foster, B.
AU  - Myronenko, V.
AU  - Wichmann, K.
AU  - Wing, Matthew
TI  - 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
IS  - DESY-16-064
M1  - PUBDB-2016-01811
M1  - DESY-16-064
M1  - arXiv:1604.02299
PY  - 2016
AB  - 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>.
KW  - correction: higher-twist (autogen)
KW  - structure function: longitudinal (autogen)
KW  - quantum chromodynamics: perturbation theory (autogen)
KW  - DGLAP equation (autogen)
KW  - DESY HERA Stor (autogen)
LB  - PUB:(DE-HGF)25 ; PUB:(DE-HGF)15
UR  - https://bib-pubdb1.desy.de/record/297267
ER  -