Report/Journal Article

PUBDB-2020-02140

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nucleon strange electromagnetic form factors

Alexandrou, C. ; Bacchio, S. ; Constantinou, M. ; Finkenrath, J. ; Hadjiyiannakou, K. ; Jansen, K.DESY* ; Koutsou, G.

2020
Inst.302363 Melville, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevD.101.031501  doi:10.3204/PUBDB-2020-02140

Report No.: arXiv:1909.10744

Abstract: The role of the strange quarks on the low-energy interactions of the proton can be probed through the strange electromagnetic form factors. Knowledge of these form factors provides essential input for parity-violating processes and contributes to the understanding of the sea quark dynamics. We determine the strange electromagnetic form factors of the nucleon within the lattice formulation of Quantum Chromodynamics using simulations that include light, strange and charm quarks in the sea all tuned to their physical mass values. We employ state-of-the-art techniques to accurately extract the form factors for values of the momentum transfer square up to 0.8~GeV$^2$. We find that both the electric and magnetic form factors are statistically non-zero. We obtain for the strange magnetic moment $\mu^s=-0.017(4)$, the strange magnetic radius $\langle r^2_M \rangle^s=-0.015(9)$~fm$^2$, and the strange charge radius $\langle r^2_E \rangle^s=-0.0048(6)$~fm$^2$.

Keyword(s): form factor: electromagnetic ; form factor: magnetic ; nucleon: form factor: electromagnetic ; quark: sea ; p: interaction ; quantum chromodynamics ; momentum transfer ; magnetic moment ; charge radius ; lattice ; charm

Note: 7 pages and 5 figures ; publication: Phys.Rev. D101 3 (2020) 031501 ; ;

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Contributing Institute(s):

1. NIC (ZEU-NIC)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2020

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Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Alexandrou, C. (Corresponding author) ; Bacchio, S. ; Constantinou, M. ; Finkenrath, J. ; Hadjiyiannakou, K. ; Jansen, K.DESY* ; Koutsou, G.
Nucleon strange electromagnetic form factors
[10.3204/PUBDB-2020-00048]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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