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Jan 10 – 14, 2022
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Determination of proton parton distribution functions using ATLAS data

Jan 12, 2022, 9:20 AM
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Parallel session talk Standard Model Precision SM Measurements


Evelin Meoni (Universita della Calabria e INFN (IT))


We present fits to determine parton distribution functions (PDFs) using inclusive W/Z-boson and W+jets measurements from the ATLAS experiment at the LHC. The ATLAS measurements are used in combination with deep-inelastic scattering data from HERA. We also present the results of PDF fits that use Z+jets measurements from ATLAS in addition to the measurements listed above. An improved determination of the sea-quark densities at high Bjorken, x, is seen, while confirming a strange-quark density similar in size to the up- and down-sea-quark densities in the range x < 0.02 found by previous ATLAS analyses. If available, PDF fits including inclusive W and Z boson production, ttbar production, W+jets and Z+jets production, inclusive jet production and direct photon production will also be presented.

Primary author

ATLAS Collaboration

Presentation materials