Geometric Scaling of $F_2$ and $F_2^c$ in data and QCD Parametrisations

Understand

The scaling properties at low $x$ of the proton DIS cross section and its charm component are analyzed with the help of the quality factor method.

• Scaling properties are tested both in the deep inelastic scattering data and in the structure functions reconstructed from CTEQ, MRST and GRV parametrisations of parton density functions.
• The results for DIS cross sections are fully compatible between data and parametrisations.
• Even with larger error bars, the charm component data favors the same geometric scaling properties as the ones of inclusive DIS.