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Title: Quark contribution to the proton spin from 2 + 1 + 1 -flavor lattice QCD

Abstract

We present the first chiral-continuum extrapolated up, down and strange quark spin contribution to the proton spin using lattice QCD. We use eleven ensembles of 2+1+1-flavors of Highly Improved Staggered Quarks (HISQ) generated by the MILC collaboration. They cover 4 lattice spacing's covering a≈{0.15,0.12,0.09,0.06} fm and two are at the physical pion mass. High-statistics estimates on each ensemble allow us to quantify systematic uncertainties and perform a simultaneous chiral-continuum extrapolation in the lattice spacing and light-quark masses.

Authors:
 [1];  [2];  [2];  [3];  [2]
  1. Michigan State Univ., East Lansing, MI (United States). Dept. of Physics and Astronomy; Michigan State Univ., East Lansing, MI (United States). Dept. of Computational Mathematics, Science and Engineering
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
PNDME Collaboration
OSTI Identifier:
1484060
Alternate Identifier(s):
OSTI ID: 1484891
Report Number(s):
BNL-209651-2018-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ
Grant/Contract Number:  
SC0012704; AC02-05CH11231; AC05-00OR22725; AC52-06NA25396
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 98; Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; lattice QCD; nucleon charges; proton spin

Citation Formats

Lin, Huey-Wen, Gupta, Rajan, Yoon, Boram, Jang, Yong-Chull, and Bhattacharya, Tanmoy. Quark contribution to the proton spin from 2+1+1 -flavor lattice QCD. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.98.094512.
Lin, Huey-Wen, Gupta, Rajan, Yoon, Boram, Jang, Yong-Chull, & Bhattacharya, Tanmoy. Quark contribution to the proton spin from 2+1+1 -flavor lattice QCD. United States. doi:10.1103/PhysRevD.98.094512.
Lin, Huey-Wen, Gupta, Rajan, Yoon, Boram, Jang, Yong-Chull, and Bhattacharya, Tanmoy. Fri . "Quark contribution to the proton spin from 2+1+1 -flavor lattice QCD". United States. doi:10.1103/PhysRevD.98.094512.
@article{osti_1484060,
title = {Quark contribution to the proton spin from 2+1+1 -flavor lattice QCD},
author = {Lin, Huey-Wen and Gupta, Rajan and Yoon, Boram and Jang, Yong-Chull and Bhattacharya, Tanmoy},
abstractNote = {We present the first chiral-continuum extrapolated up, down and strange quark spin contribution to the proton spin using lattice QCD. We use eleven ensembles of 2+1+1-flavors of Highly Improved Staggered Quarks (HISQ) generated by the MILC collaboration. They cover 4 lattice spacing's covering a≈{0.15,0.12,0.09,0.06} fm and two are at the physical pion mass. High-statistics estimates on each ensemble allow us to quantify systematic uncertainties and perform a simultaneous chiral-continuum extrapolation in the lattice spacing and light-quark masses.},
doi = {10.1103/PhysRevD.98.094512},
journal = {Physical Review D},
number = 9,
volume = 98,
place = {United States},
year = {Fri Nov 30 00:00:00 EST 2018},
month = {Fri Nov 30 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.98.094512

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