Parton distributions and lattice QCD calculations: A community white paper

Huey Wen Lin, Emanuele R. Nocera, Fred Olness, Kostas Orginos, Juan Rojo, Alberto Accardi, Constantia Alexandrou, Alessandro Bacchetta, Giuseppe Bozzi, Jiunn Wei Chen, Sara Collins, Amanda Cooper-Sarkar, Martha Constantinou, Luigi Del Debbio, Michael Engelhardt, Jeremy Green, Rajan Gupta, Lucian A. Harland-Lang, Tomomi Ishikawa, Aleksander Kusina & 12 others Keh Fei Liu, Simonetta Liuti, Christopher Monahan, Pavel Nadolsky, Jian Wei Qiu, Ingo Schienbein, Gerrit Schierholz, Robert S. Thorne, Werner Vogelsang, Hartmut Wittig, C. P. Yuan, James Zanotti

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)107-160
Number of pages54
JournalProgress in Particle and Nuclear Physics
Volume100
Issue numberMay
Early online date31 Jan 2018
DOIs
Publication statusPublished - May 2018

Fingerprint

partons
quantum chromodynamics
distribution functions
moments
factorization
theorems
quarks
momentum
operators
protons
scattering

Bibliographical note

PDF ArXiv: 80 pages, 15 figures, 28 tables

Keywords

  • Global QCD fits
  • Lattice QCD
  • Unpolarized/polarized parton distribution functions (PDFs)

Cite this

Lin, H. W., Nocera, E. R., Olness, F., Orginos, K., Rojo, J., Accardi, A., ... Zanotti, J. (2018). Parton distributions and lattice QCD calculations: A community white paper. Progress in Particle and Nuclear Physics, 100(May), 107-160. https://doi.org/10.1016/j.ppnp.2018.01.007
Lin, Huey Wen ; Nocera, Emanuele R. ; Olness, Fred ; Orginos, Kostas ; Rojo, Juan ; 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. / Parton distributions and lattice QCD calculations: A community white paper. In: Progress in Particle and Nuclear Physics. 2018 ; Vol. 100, No. May. pp. 107-160.
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Lin, HW, Nocera, ER, Olness, F, Orginos, K, Rojo, J, Accardi, A, Alexandrou, C, Bacchetta, A, Bozzi, G, Chen, JW, Collins, S, Cooper-Sarkar, A, Constantinou, M, Del Debbio, L, Engelhardt, M, Green, J, Gupta, R, Harland-Lang, LA, Ishikawa, T, Kusina, A, Liu, KF, Liuti, S, Monahan, C, Nadolsky, P, Qiu, JW, Schienbein, I, Schierholz, G, Thorne, RS, Vogelsang, W, Wittig, H, Yuan, CP & Zanotti, J 2018, 'Parton distributions and lattice QCD calculations: A community white paper' Progress in Particle and Nuclear Physics, vol. 100, no. May, pp. 107-160. https://doi.org/10.1016/j.ppnp.2018.01.007

Parton distributions and lattice QCD calculations: A community white paper. / Lin, Huey Wen; Nocera, Emanuele R.; Olness, Fred; Orginos, Kostas; Rojo, Juan; 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.

In: Progress in Particle and Nuclear Physics, Vol. 100, No. May, 05.2018, p. 107-160.

Research output: Contribution to JournalArticleAcademicpeer-review

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AU - Lin, Huey Wen

AU - Nocera, Emanuele R.

AU - Olness, Fred

AU - Orginos, Kostas

AU - Rojo, Juan

AU - Accardi, Alberto

AU - Alexandrou, Constantia

AU - Bacchetta, Alessandro

AU - Bozzi, Giuseppe

AU - Chen, Jiunn Wei

AU - Collins, Sara

AU - Cooper-Sarkar, Amanda

AU - Constantinou, Martha

AU - Del Debbio, Luigi

AU - Engelhardt, Michael

AU - Green, Jeremy

AU - Gupta, Rajan

AU - Harland-Lang, Lucian A.

AU - Ishikawa, Tomomi

AU - Kusina, Aleksander

AU - Liu, Keh Fei

AU - Liuti, Simonetta

AU - Monahan, Christopher

AU - Nadolsky, Pavel

AU - Qiu, Jian Wei

AU - Schienbein, Ingo

AU - Schierholz, Gerrit

AU - Thorne, Robert S.

AU - Vogelsang, Werner

AU - Wittig, Hartmut

AU - Yuan, C. P.

AU - Zanotti, James

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