80 citations · 80 across the 2 of their papers we have counts for
6 papers · 1 filter
Two-loop massive fermionic operator matrix elements and intial state QED corrections to e^+e^- \to γ^*/Z^*
J. Blümlein, A. De Freitas, W. van Neerven
We describe the calculation of the two--loop massive operator matrix elements for massive external fermions. These matrix elements are needed for the calculation of the in…
The Longitudinal Heavy Quark Structure Function F_{L}^{Q\bar{Q}} in the Region Q^2 \gg m^2 at O(α_s^3)
J. Blümlein, A. De Freitas, W. L. van Neerven +1
The logarithmic and constant contributions to the Wilson coefficient of the longitudinal heavy quark structure function to are calculated using mass factorization techni…
The Drell-Levy-Yan Relation: ep vs Scattering to
J. Blümlein, V. Ravindran, W. L. van Neerven
We study the validity of a relation by Drell, Levy and Yan (DLY) connecting the deep inelastic structure (DIS) functions and the single-particle fragmentation functions in …
The Unpolarized Gluon Anomalous Dimension at Small x
J. Blümlein, V. Ravindran, W. L. van Neerven +1
We discuss the quantitative consequences of the resummation of the small-x contributions to the anomalous dimensions beyond next-to-leading order in alpha_s and up to next order in…
Relations among polarized and unpolarized splitting functions beyond leading order
J. Blümlein, V. Ravindran, W. L. van Neerven
The role of various symmetries in the evaluation of splitting functions and coefficient functions is discussed. The scale invariance in hard processes is known to be a guiding tool…
A Detailed Comparison of NLO QCD Evolution Codes
J. Blümlein, M. Botje, C. Pascaud +4
Seven next-to-leading order QCD evolution programs are compared. The deviations of the results due to different theoretical prescriptions for truncating the perturbative series are…