Nucleon isovector charges and twist-2 matrix elements with Nf=2+1 dynamical Wilson quarks

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • Tim Harris
  • Georg von Hippel
  • Parikshit Junnarkar
  • Harvey B Meyer
  • Konstantin Ottnad
  • Jonas Wilhelm
  • Hartmut Wittig
  • Linus Wrang
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000482087700001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1103/PhysRevD.100.034513
eISSN
2470-0029
Externe Identifier
  • Clarivate Analytics Document Solution ID: IS3XQ
ISSN
2470-0010
Ausgabe der Veröffentlichung
3
Zeitschrift
PHYSICAL REVIEW D
Artikelnummer
ARTN 034513
Datum der Veröffentlichung
2019
Status
Published
Titel
Nucleon isovector charges and twist-2 matrix elements with <i>N<sub>f</sub></i>=2+1 dynamical Wilson quarks
Sub types
  • Article
Ausgabe der Zeitschrift
100

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Autoren
  • Tim Harris
  • Georg von Hippel
  • Parikshit Junnarkar
  • Harvey B Meyer
  • Konstantin Ottnad
  • Jonas Wilhelm
  • Hartmut Wittig
  • Linus Wrang
DOI
10.1103/physrevd.100.034513
eISSN
2470-0029
ISSN
2470-0010
Ausgabe der Veröffentlichung
3
Zeitschrift
Physical Review D
Sprache
en
Artikelnummer
034513
Online publication date
2019
Status
Published online
Herausgeber
American Physical Society (APS)
Herausgeber URL
http://dx.doi.org/10.1103/physrevd.100.034513
Datum der Datenerfassung
2019
Titel
Nucleon isovector charges and twist-2 matrix elements with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>N</mml:mi><mml:mi>f</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>2</mml:mn><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:math> dynamical Wilson quarks
Ausgabe der Zeitschrift
100

Datenquelle: Crossref

Abstract
We present results from a lattice QCD study of nucleon matrix elements at vanishing momentum transfer for local and twist-2 isovector operator insertions. Computations are performed on gauge ensembles with non-perturbatively improved $N_f=2+1$ Wilson fermions, covering four values of the lattice spacing and pion masses down to $M_\pi\approx200$MeV. Several source-sink separations (typically ~1.0fm to ~1.5fm) allow us to assess excited-state contamination. Results on individual ensembles are obtained from simultaneous two-state fits across all observables and all available source-sink separations with the energy gap as a common fit parameter. Renormalization has been performed non-perturbatively using the Rome-Southampton method for all but the finest lattice spacing for which an extrapolation has been used. Physical results are quoted in the $\overline{MS}$ scheme at a scale of $\mu=2$GeV and are obtained from a combined chiral, continuum and finite-size extrapolation. For the nucleon isovector axial, scalar and tensor charges we find physical values of $g_A^{u-d}=1.242(25)_\text{stat}(\genfrac{}{}{0pt}{2}{+00}{-31})_\text{sys}$, $g_S^{u-d}=1.13(11)_\text{stat}(\genfrac{}{}{0pt}{2}{+07}{-06})_\text{sys}$ and $g_T^{u-d}=0.965(38)_\text{stat}(\genfrac{}{}{0pt}{2}{+13}{-41})_\text{sys}$, respectively, where individual systematic errors in each direction from the chiral, continuum and finite-size extrapolation have been added in quadrature. Our final results for the isovector average quark momentum fraction and the isovector helicity and transversity moments are given by $\langle x\rangle_{u-d}=0.180(25)_\text{stat}(\genfrac{}{}{0pt}{2}{+14}{-06})_\text{sys}$, $\langle x\rangle_{\Delta u-\Delta d}=0.221(25)_\text{stat}(\genfrac{}{}{0pt}{2}{+10}{-00})_\text{sys}$ and $\langle x\rangle_{\delta u-\delta d}=0.212(32)_\text{stat}(\genfrac{}{}{0pt}{2}{+20}{-10})_\text{sys}$, respectively.
Autoren
  • Tim Harris
  • Georg von Hippel
  • Parikshit Junnarkar
  • Harvey B Meyer
  • Konstantin Ottnad
  • Jonas Wilhelm
  • Hartmut Wittig
  • Linus Wrang
Autoren-URL
http://arxiv.org/abs/1905.01291v2
Zeitschrift
Phys. Rev. D
Schlüsselwörter
  • hep-lat
  • hep-lat
  • hep-ph
  • nucl-th
Notes
35 pages, 13 figures; matching version accepted for publication in PRD
Paginierung
034513
Datum der Veröffentlichung
2019
Herausgeber URL
http://dx.doi.org/10.1103/PhysRevD.100.034513
Datum der Datenerfassung
2019
Datum, an dem der Datensatz öffentlich gemacht wurde
2019
Titel
Nucleon isovector charges and twist-2 matrix elements with $N_f=2+1$ dynamical Wilson quarks
Ausgabe der Zeitschrift
100

Files

1905.01291v2.pdf

Datenquelle: arXiv

Beziehungen:
Eigentum von

Werkzeuge