NNPDF4.0 Higher Twist
We present a global determination of parton distribution functions (PDFs) that accounts for higher twist
corrections in deep-inelastic scattering (DIS) and linear power corrections for single inclusive jet and dijet production data from the LHC. We employ a methodology based on the theory covariance formalism, previously used to account for nuclear uncertainties and missing higher order uncertainties (MHOUs) in global PDF determinations. We study the impact of power corrections on the extracted PDFs and demonstrate an improved description of the data. We also observe a reduced sensitivity to DIS data in the low-Q2 region where higher twist corrections are large. While the impact of the linear power corrections for dijet production is limited, we find that they can be significant for single inclusive jet production at the LHC. Finally, we assess the impact of power corrections on observables relevant to LHC phenomenology, including Higgs production via gluon fusion, and the determination of the strong coupling. We find that these corrections have significant effects, generally improving perturbative convergence.
Released sets:
NNPDF40_an3lo_as_01180_mhou_ht