Flavor Decomposition for the Proton Helicity Parton Distribution Functions
Abstract
We present, for the first time, an ab initio calculation of the individual up, down, and strange quark helicity parton distribution functions for the proton. The calculation is performed within the twisted mass clover-improved fermion formulation of lattice QCD. The analysis is performed using one ensemble of dynamical up, down, strange, and charm quarks with a pion mass of 260 MeV. The lattice matrix elements are nonperturbatively renormalized and the final results are presented in the $$\overline{MS}$$ scheme at a scale of 2 GeV. We give results for Δu+ (x), Δd+ (x) Δu⁻ (x), Δd⁻ (x), including disconnected quark loop contributions, as well as for Δs+ (x) and Δs⁻ (x) . For the latter we achieve unprecedented precision compared to the phenomenological estimates.
- Publication Date:
- Research Org.:
- Temple Univ., Philadelphia, PA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); Cyprus Research and Innovation Foundation; European Unions Horizon 2020 research and Innovation Programme; National Science Foundation (NSF); US Army Research Laboratory (USARL); Sponsoring Consortium for Open Access Publishing in Particle Physics (SCOAP3)
- OSTI Identifier:
- 1770622
- Alternate Identifier(s):
- OSTI ID: 1853636
- Grant/Contract Number:
- SC0020405; AC05-00OR22725; POST-DOC/0718/0100; 765048; 1625061; W911NF-16-2- 0189
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Name: Physical Review Letters Journal Volume: 126 Journal Issue: 10; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Physics; lattice field theory; quantum field theory; particle interactions; particle phenomena; strong interaction; quantum chromodynamics
Citation Formats
Alexandrou, Constantia, Constantinou, Martha, Hadjiyiannakou, Kyriakos, Jansen, Karl, and Manigrasso, Floriano. Flavor Decomposition for the Proton Helicity Parton Distribution Functions. United States: N. p., 2021.
Web. doi:10.1103/PhysRevLett.126.102003.
Alexandrou, Constantia, Constantinou, Martha, Hadjiyiannakou, Kyriakos, Jansen, Karl, & Manigrasso, Floriano. Flavor Decomposition for the Proton Helicity Parton Distribution Functions. United States. https://doi.org/10.1103/PhysRevLett.126.102003
Alexandrou, Constantia, Constantinou, Martha, Hadjiyiannakou, Kyriakos, Jansen, Karl, and Manigrasso, Floriano. Fri .
"Flavor Decomposition for the Proton Helicity Parton Distribution Functions". United States. https://doi.org/10.1103/PhysRevLett.126.102003.
@article{osti_1770622,
title = {Flavor Decomposition for the Proton Helicity Parton Distribution Functions},
author = {Alexandrou, Constantia and Constantinou, Martha and Hadjiyiannakou, Kyriakos and Jansen, Karl and Manigrasso, Floriano},
abstractNote = {We present, for the first time, an ab initio calculation of the individual up, down, and strange quark helicity parton distribution functions for the proton. The calculation is performed within the twisted mass clover-improved fermion formulation of lattice QCD. The analysis is performed using one ensemble of dynamical up, down, strange, and charm quarks with a pion mass of 260 MeV. The lattice matrix elements are nonperturbatively renormalized and the final results are presented in the $\overline{MS}$ scheme at a scale of 2 GeV. We give results for Δu+ (x), Δd+ (x) Δu⁻ (x), Δd⁻ (x), including disconnected quark loop contributions, as well as for Δs+ (x) and Δs⁻ (x) . For the latter we achieve unprecedented precision compared to the phenomenological estimates.},
doi = {10.1103/PhysRevLett.126.102003},
journal = {Physical Review Letters},
number = 10,
volume = 126,
place = {United States},
year = {Fri Mar 12 00:00:00 EST 2021},
month = {Fri Mar 12 00:00:00 EST 2021}
}
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