Details

Autor(en) / Beteiligte

• Lin, Huey-Wen
• Nocera, Emanuele R.
• Olness, Fred
• Orginos, Kostas
• Accardi, Alberto
• Alexandrou, Constantia
• Bacchetta, Alessandro
• Bozzi, Giuseppe
• Chen, Jiunn-Wei
• Collins, Sara
• Cooper-Sarkar, Amanda
• Constantinou, Martha
• Del Debbio, Luigi
• Engelhardt, Michael
• Green, Jeremy
• Gupta, Rajan
• Harland-Lang, Lucian A.
• Ishikawa, Tomomi
• Kusina, Aleksander
• Liu, Keh-Fei
• Liuti, Simonetta
• Monahan, Christopher
• Nadolsky, Pavel
• Qiu, Jian-Wei
• Schienbein, Ingo
• Schierholz, Gerrit
• Thorne, Robert S.
• Vogelsang, Werner
• Wittig, Hartmut
• Yuan, C.-P.
• Zanotti, James
• Rojo, Juan

Titel

Parton distributions and lattice QCD calculations: A community white paper

Ist Teil von

• Progress in particle and nuclear physics, 2018-05, Vol.100, p.107-160

Ort / Verlag

United States: Elsevier B.V

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• In the framework of quantum chromodynamics (QCD), parton distribution functions (PDFs) quantify how the momentum and spin of a hadron are divided among its quark and gluon constituents. Two main approaches exist to determine PDFs. The first approach, based on QCD factorization theorems, realizes a QCD analysis of a suitable set of hard-scattering measurements, often using a variety of hadronic observables. The second approach, based on first-principle operator definitions of PDFs, uses lattice QCD to compute directly some PDF-related quantities, such as their moments. Motivated by recent progress in both approaches, in this document we present an overview of lattice-QCD and global-analysis techniques used to determine unpolarized and polarized proton PDFs and their moments. We provide benchmark numbers to validate present and future lattice-QCD calculations and we illustrate how they could be used to reduce the PDF uncertainties in current unpolarized and polarized global analyses. This document represents a first step towards establishing a common language between the two communities, to foster dialogue and to further improve our knowledge of PDFs.