Nucleon Form Factors from the Feynman-Hellmann Method in Lattice QCD
| Autor: | Batelaan, Mischa, Horsley, Roger, QCDSF-UKQCD-CSSM Collaboration, Nakamura, Yoshifumi, Perlt, Holger, Pleiter, Dirk, Rakow, P. E. L., Schierholz, Gerrit, Stuben, Hinnerk, Young, R. D., Zanotti, James |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
electric [form factor]
pi mass quantum chromodynamics lattice High Energy Physics::Lattice FOS: Physical sciences fermion: flavor lattice [quantum chromodynamics] form factor [nucleon] GeV mass [pi] pi: mass 3 [flavor] High Energy Physics - Lattice momentum transfer: low form factor [up] up [form factor] excited state nucleon form factor flavor: 3 ddc:530 nucleon: form factor high [momentum transfer] High Energy Physics - Lattice (hep-lat) form factor electromagnetic momentum transfer low form factor up lattice field theory form factor: electric momentum transfer high flavor [fermion] crossing form factor: electromagnetic up: form factor up form factor fermion flavor form factor electric quantum chromodynamics: lattice low [momentum transfer] electromagnetic [form factor] form factor: up momentum transfer: high |
| Zdroj: | Proceedings of Science / International School for Advanced Studies (LATTICE2021), 426 (2022). doi:10.22323/1.396.0426 38th International Symposium on Lattice Field Theory, LATTICE2021, Online, United States, 2021-07-26-2021-07-30 |
| DOI: | 10.3204/PUBDB-2022-00327 |
| Popis: | 38th International Symposium on Lattice Field Theory, LATTICE2021 , Online, United States, 26 Jul 2021 - 30 Jul 2021; Proceedings of Science / International School for Advanced Studies (LATTICE2021), 426 (2022). doi:10.22323/1.396.0426 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 $6\ \textrm{GeV}^2$ , using $𝑁_f=2+1$ flavour fermions for three different pion masses in the range $310-470 \textrm{MeV}$. The results are extrapolated to the physical pion mass through the use of a flavour breaking expansion. Published by SISSA, Trieste |
| Databáze: | OpenAIRE |
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