QCD Evolution Of Structure Functions Research Articles

Theoretical uncertainties in the QCD evolution of structure functions and their impact on αs(MZ2)

The differences are discussed between various next-to-leading order prescriptions for the QCD evolution of parton densities and structure functions. Their quantitative impact is understood to an accuracy of 0.02\%. The uncertainties due to the freedom to choose the renormalization and factorization scales are studied. The quantitative consequences of the different uncertainties on the extraction of the strong coupling constant $\alpha_s$ from scaling violations in deep--inelastic scattering are estimated for the kinematic regime accessible at HERA.

Theoretical uncertainties in the QCD evolution of structure functions and their impact on αs(MZ2)*

Theoretical uncertainties in the QCD evolution of structure functions and their impact on αs(MZ2)*

A Monte Carlo method to calculate the QCD evolution of structure functions with the inclusion of heavy quark effects

A Monte Carlo method is presented for the calculation of the QCD evolution of structure functions. Its application is discussed in detail in the framework of the LLA, but it can also be used with modified parton decay probability functions including higher-order effects. For heavy quark production, threshold constraints can be correctly taken into account, and one obtains results which at low Q 2 are consistent with those of the photon—gluon fusion model.