Isovector electromagnetic form factors of the nucleon from lattice QCD and the proton radius puzzle
- Publication type:
- Journal article
- Metadata:
-
- Autoren
- D Djukanovic
- T Harris
- G von Hippel
- PM Junnarkar
- HB Meyer
- D Mohler
- K Ottnad
- T Schulz
- J Wilhelm
- H Wittig
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000655873200001&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1103/PhysRevD.103.094522
- eISSN
- 2470-0029
- Externe Identifier
- Clarivate Analytics Document Solution ID: SJ9VM
- ISSN
- 2470-0010
- Ausgabe der Veröffentlichung
- 9
- Zeitschrift
- PHYSICAL REVIEW D
- Artikelnummer
- ARTN 094522
- Datum der Veröffentlichung
- 2021
- Status
- Published
- Titel
- Isovector electromagnetic form factors of the nucleon from lattice QCD and the proton radius puzzle
- Sub types
- Article
- Ausgabe der Zeitschrift
- 103
Data source: Web of Science (Lite)
- Other metadata sources:
-
- Autoren
- D Djukanovic
- T Harris
- G von Hippel
- PM Junnarkar
- HB Meyer
- D Mohler
- K Ottnad
- T Schulz
- J Wilhelm
- H Wittig
- DOI
- 10.1103/physrevd.103.094522
- eISSN
- 2470-0029
- ISSN
- 2470-0010
- Ausgabe der Veröffentlichung
- 9
- Zeitschrift
- Physical Review D
- Sprache
- en
- Artikelnummer
- 094522
- Online publication date
- 2021
- Status
- Published online
- Herausgeber
- American Physical Society (APS)
- Herausgeber URL
- http://dx.doi.org/10.1103/physrevd.103.094522
- Datum der Datenerfassung
- 2021
- Titel
- Isovector electromagnetic form factors of the nucleon from lattice QCD and the proton radius puzzle
- Ausgabe der Zeitschrift
- 103
Data source: Crossref
- Abstract
- We present results for the isovector electromagnetic form factors of the nucleon computed on the CLS ensembles with $N_f=2+1$ flavors of $\mathcal{O}(a)$-improved Wilson fermions and an $\mathcal{O}(a)$-improved vector current. The analysis includes ensembles with four lattice spacings and pion masses ranging from 130 MeV up to 350 MeV and mainly targets the low-$Q^2$ region. In order to remove any bias from unsuppressed excited-state contributions, we investigate several source-sink separations between 1.0 fm and 1.5 fm and apply the summation method as well as explicit two-state fits. The chiral interpolation is performed by applying covariant chiral perturbation theory including vector mesons directly to our form factor data, thus avoiding an auxiliary parametrization of the $Q^2$ dependence. At the physical point, we obtain $\mu=4.71(11)_{\mathrm{stat}}(13)_{\mathrm{sys}}$ for the nucleon isovector magnetic moment, in good agreement with the experimental value and $\langle r_\mathrm{M}^2\rangle~=~0.661(30)_{\mathrm{stat}}(11)_{\mathrm{sys}}\,~\mathrm{fm}^2$ for the corresponding square-radius, again in good agreement with the value inferred from the $ep$-scattering determination [Bernauer et~al., Phys. Rev. Lett., 105, 242001 (2010)] of the proton radius. Our estimate for the isovector electric charge radius, $\langle r_\mathrm{E}^2\rangle = 0.800(25)_{\mathrm{stat}}(22)_{\mathrm{sys}}\,~\mathrm{fm}^2$, however, is in slight tension with the larger value inferred from the aforementioned $ep$-scattering data, while being in agreement with the value derived from the 2018 CODATA average for the proton charge radius.
- Autoren
- D Djukanovic
- T Harris
- G von Hippel
- PM Junnarkar
- HB Meyer
- D Mohler
- K Ottnad
- T Schulz
- J Wilhelm
- H Wittig
- Autoren-URL
- http://arxiv.org/abs/2102.07460v1
- Zeitschrift
- Phys. Rev. D
- Schlüsselwörter
- hep-lat
- hep-lat
- hep-ph
- nucl-th
- Paginierung
- 094522
- Datum der Veröffentlichung
- 2021
- Herausgeber URL
- http://dx.doi.org/10.1103/PhysRevD.103.094522
- Datum der Datenerfassung
- 2021
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2021
- Titel
- Isovector electromagnetic form factors of the nucleon from lattice QCD and the proton radius puzzle
- Ausgabe der Zeitschrift
- 103
Files
2102.07460v1.pdf
Data source: arXiv
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