Volume 508 - QCD at the Extremes (QCDEX2025) - Session: Parton Densities and TMDs at high scales, including Heavy Boson PDFs
Developments in collinear and TMD heavy boson probability density functions
K. Moral Figueroa*, E. Gallo, H. Jung and S.T. Monfared
*: corresponding author
Full text: pdf
Pre-published on: November 19, 2025
Published on: —
Abstract
Parton probability density functions are derived via a DGLAP-type equation involving QCD and electroweak terms. The Parton-Branching (PB) method is employed in order to derive the solution and the evolution is obtained at leading order (LO) for electroweak bosons and next-to-leading order (NLO) for QCD partons.

This novel solution is performed through an initial fit of QCD parton density functions to HERA deep inelastic scattering (DIS) data, along a perturbative generation of electroweak boson densities.

Finally, the obtained densities in both collinear (PDF) and transverse-momentum dependent (TMD) form are provided in a parametrised form for phenomenological studies and its implementation in standard HEP libraries
DOI: https://doi.org/10.22323/1.508.0007
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