Parton distributions and lattice QCD calculations: A community white paper
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 paper 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. Finally, 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.
- Authors:
-
more »
- Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy. Dept. of Computational Mathematics
- Univ. of Oxford (United Kingdom). Rudolf Peierls Centre for Theoretical Physics; Univ. of Edinburgh, Scotland (United Kingdom). Higgs Centre for Theoretical Physics. School of Physics and Astronomy
- Southern Methodist Univ., Dallas, TX (United States). Dept. of Physics
- College of William and Mary, Williamsburg, VA (United States). Physics Dept.; Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Vrije Univ. (VU), Amsterdam (Netherlands). Dept. of Physics and Astronomy; Nikhef, Amsterdam (Netherlands)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Hampton Univ., Hampton, VA (United States)
- Univ. of Cyprus, Nicosia (Cyprus). Dept. of Physics; The Cyprus Inst., Nicosia (Cyprus). Computation-based Science and Technology Research
- Univ. of Pavia (Italy). Dept. of Physics; National Inst. of Nuclear Physics (INFN), Pavia (Italy)
- National Taiwan Univ., Taipei (Taiwan). Dept. of Physics. Center for Theoretical Sciences. Leung Center for Cosmology and Particle Astrophysics
- Univ. of Regensburg (Germany). Inst. for Theoretical Physics
- Univ. of Oxford (United Kingdom). Dept. of Physics
- Temple Univ., Philadelphia, PA (United States). Dept. of Physics
- Univ. of Edinburgh, Scotland (United Kingdom). Higgs Centre for Theoretical Physics. School of Physics and Astronomy
- New Mexico State Univ., Las Cruces, NM (United States). Dept. of Physics
- Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany). John von Neumann-Inst. for Computing (NIC)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Oxford (United Kingdom). Rudolf Peierls Centre for Theoretical Physics; Univ. College London (United Kingdom). Dept. of Physics and Astronomy
- Shanghai Jiao Tong Univ. (China). T. D. Lee Inst.
- Polish Academy of Sciences, Krakow (Poland). Inst. of Nuclear Physics
- Univ. of Kentucky, Lexington, KY (United States). Dept. of Physics and Astronomy
- Univ. of Virginia, Charlottesville, VA (United States). Physics Dept.; National Inst. of Nuclear Physics (INFN), Frascati (Italy). National Lab. of Frascati
- Univ. of Washington, Seattle, WA (United States). Inst. for Nuclear Theory
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Univ. Grenoble-Alpes, Grenoble (France). Lab. of Subatomic Physics and Cosmology
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- Univ. College London (United Kingdom). Dept. of Physics and Astronomy
- Tubingen Univ. (Germany). Inst. for Theoretical Physics
- Johannes Gutenberg Univ., Mainz (Germany). PRISMA Cluster of Excellence. Inst. for Nuclear Physics
- Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy
- Univ. of Adelaide, SA (Australia). Special Research Centre for the Subatomic Structure of Matter (CSSM). Dept. of Physics
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of Washington, Seattle, WA (United States); College of William and Mary, Williamsburg, VA (United States); Southern Methodist Univ., Dallas, TX (United States); Hampton Univ., Hampton, VA (United States); New Mexico State Univ., Las Cruces, NM (United States); Univ. of Virginia, Charlottesville, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), High Energy Physics (HEP); BNL Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1433816
- Alternate Identifier(s):
- OSTI ID: 1548771
- Report Number(s):
- JLAB-THY-17-2604; DOE/OR/23177-4281; arXiv:1711.07916
Journal ID: ISSN 0146-6410; PII: S0146641018300073; TRN: US1802667
- Grant/Contract Number:
- AC05-06OR23177; FG02-00ER41132; FG02-04ER41302; SC0010129; SC0008791; FG02-96ER40965; SC0016286; SC008791; KA-1401020
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Progress in Particle and Nuclear Physics
- Additional Journal Information:
- Journal Volume: 100; Journal ID: ISSN 0146-6410
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; lattice QCD; global QCD fits; unpolarized/polarized parton distribution functions (PDFs)
Citation Formats
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., and Zanotti, James. Parton distributions and lattice QCD calculations: A community white paper. United States: N. p., 2018.
Web. doi: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. United States. 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., and Zanotti, James. Wed .
"Parton distributions and lattice QCD calculations: A community white paper". United States. https://doi.org/10.1016/j.ppnp.2018.01.007. https://www.osti.gov/servlets/purl/1433816.
@article{osti_1433816,
title = {Parton distributions and lattice QCD calculations: A community white paper},
author = {Lin, Huey-Wen and Nocera, Emanuele R. and Olness, Fred and Orginos, Kostas and Rojo, Juan and Accardi, Alberto and Alexandrou, Constantia and Bacchetta, Alessandro and Bozzi, Giuseppe and Chen, Jiunn-Wei and Collins, Sara and Cooper-Sarkar, Amanda and Constantinou, Martha and Del Debbio, Luigi and Engelhardt, Michael and Green, Jeremy and Gupta, Rajan and Harland-Lang, Lucian A. and Ishikawa, Tomomi and Kusina, Aleksander and Liu, Keh-Fei and Liuti, Simonetta and Monahan, Christopher and Nadolsky, Pavel and Qiu, Jian-Wei and Schienbein, Ingo and Schierholz, Gerrit and Thorne, Robert S. and Vogelsang, Werner and Wittig, Hartmut and Yuan, C. -P. and Zanotti, James},
abstractNote = {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 paper 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. Finally, 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.},
doi = {10.1016/j.ppnp.2018.01.007},
journal = {Progress in Particle and Nuclear Physics},
number = ,
volume = 100,
place = {United States},
year = {2018},
month = {1}
}
Web of Science
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