Parton distributions with QED corrections
The NNPDF Collaboration: Richard D. Ball, Valerio Bertone, Stefano, Carrazza, Luigi Del Debbio, Stefano Forte, Alberto Guffanti, Nathan P., Hartland, Juan Rojo
TL;DR
This paper introduces an updated set of parton distribution functions that incorporate QED effects and a photon component, enabling more precise predictions for high-energy collider processes.
Contribution
It provides the first determination of PDFs with combined QCD and QED evolution, including a photon PDF, based on comprehensive collider data.
Findings
The NNPDF2.3QED set includes a photon PDF and QED corrections.
Comparison shows differences with older MRST2004QED PDFs.
Preliminary phenomenological studies indicate photon-induced effects at the LHC.
Abstract
We present a set of parton distribution functions (PDFs), based on the NNPDF2.3 set, which includes a photon PDF, and QED contributions to parton evolution. We describe the implementation of the combined QCD+QED evolution in the NNPDF framework. We then provide a first determination of the full set of PDFs based on deep-inelastic scattering data and LHC data for W and Z/gamma* Drell-Yan production, using leading-order QED and NLO or NNLO QCD. We compare the ensuing NNPDF2.3QED PDF set to the older MRST2004QED set. We perform a preliminary investigation of the phenomenological implications of NNPDF2.3QED: specifically, photon-induced corrections to direct photon production at HERA, and high-mass dilepton and W pair production at the LHC.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.