XXVIII International Workshop on Deep Inelastic Scattering and Related Subjects

Determination of proton parton distribution functions using ATLAS data

Mar 24, 2020, 3:06 PM

18m

Brooklyn, NY

Contributed Talk Structure Functions and Parton Densities Structure function and parton densities

Speaker

Stefano CAMARDA

Description

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. If available, we also present the results of PDF fits that use Z+jets measurements from ATLAS in addition to the measurements listed above. The ATLAS W and Z boson data exhibit sensitivity to the valence quark distributions and the light quark sea composition. The parton distribution functions extracted using W+jets data show an improved determination of the high-​x s​ea-quark densities, while confirming the unsuppressed strange-quark density at lower x<0.02 found by previous ATLAS analyses.