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Nucleon Form Factors from the Feynman-Hellmann Method in Lattice QCD
Vise andre og tillknytning
2022 (engelsk)Inngår i: Proceedings of Science, Sissa Medialab Srl , 2022Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Lattice QCD calculations of the nucleon electromagnetic form factors are of interest at both the high and low momentum transfer regions. For high momentum transfers especially there are open questions which require more intense study, such as the potential zero crossing in the proton's electric form factor. We will present recent progress from the QCDSF/UKQCD/CSSM collaboration on the calculation of these form factors using the Feynman-Hellmann method in lattice QCD. The Feynman-Hellmann method allows for greater control over excited states which we take advantage of by going to high values of the momentum transfer. In this proceeding we present results of the form factors up to 6 GeV2, using Nf = 2 + 1 flavour fermions for three different pion masses in the range 310-470 MeV. The results are extrapolated to the physical pion mass through the use of a flavour breaking expansion. 

sted, utgiver, år, opplag, sider
Sissa Medialab Srl , 2022.
Emneord [en]
Approximation theory, Hadrons, Momentum, Quantum theory, Electric forms, Electromagnetic form factors, Excited-states, Form factors, Lattice QCD, Lattice QCD calculations, Low momentum transfers, Nucleon form factors, Recent progress, Zero-crossings, Momentum transfer
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-325999Scopus ID: 2-s2.0-85134428641OAI: oai:DiVA.org:kth-325999DiVA, id: diva2:1752176
Konferanse
38th International Symposium on Lattice Field Theory, LATTICE 2021, 26-30 July 2021
Merknad

QC 20230421

Tilgjengelig fra: 2023-04-21 Laget: 2023-04-21 Sist oppdatert: 2023-04-21bibliografisk kontrollert

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