Collinear and TMD parton densities from fits to precision DIS measurements in the parton branching method

Understand

Collinear and transverse momentum dependent (TMD) parton densities are obtained from fits to precision measurements of deep inelastic scattering (DIS) cross sections at HERA.

• The parton densities are evolved by DGLAP evolution with next-to-leading-order (NLO) splitting functions using the parton branching method, allowing one to determine simultaneously collinear and TMD densities for all flavors over a wide range in $x$, $\mu^2$ and $k_t$, relevant for predictions at the LHC.
• The DIS cross section is computed from the parton densities using perturbative NLO coefficient functions.
• Parton densities satisfying angular ordering conditions are presented.