Window Observables for Benchmarking Parton Distribution Functions

Year: 2025

Type: article

Abstract: Global analysis of collider and fixed-target experimental data and calculations from lattice quantum chromodynamics (QCD) are used to gain complementary information on the structure of hadrons. We propose novel "window observables" that allow for higher precision cross-validation between the different approaches, a critical step for studies that wish to combine the datasets. Global analyses are limited by the kinematic regions accessible to experiment, particularly in a range of Bjorken-x, and lattice QCD calculations also have limitations requiring extrapolations to obtain the parton distributions. We provide two different window observables that can be defined within a region of x where extrapolations and interpolations in global analyses remain reliable and where lattice QCD results retain sensitivity and precision.

Source: Physical Review Letters

DOI: 10.1103/q6jl-816j

Authors: Joe Karpie, Christopher J. Monahan, Kostas Orginos, Savvas Zafeiropoulos

Institutions: Thomas Jefferson National Accelerator Facility, Colorado College, William & Mary, Centre National de la Recherche Scientifique, Université de Toulon, Aix-Marseille Université, Centre de Physique Théorique

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750

Funders: Centre Informatique National de l’Enseignement Supérieur, National Science Foundation, U.S. Department of Energy, Commonwealth of Virginia, National Energy Research Scientific Computing Center, Agence Nationale de la Recherche, American Academy in Rome, Grand Équipement National De Calcul Intensif, Office of Science, Advanced Scientific Computing Research, Nuclear Physics, Oak Ridge National Laboratory, Thomas Jefferson National Accelerator Facility

OpenAlex ID: W4415137607