Nucleon Form Factors from the Feynman-Hellmann Method in Lattice QCD

Batelaan, Mischa, Horsley, Roger, Nakamura, Yoshifumi, Perlt, Holger, Pleiter, Dirk, Rakow, Paul ORCID: 0000-0003-4486-2158, Schierholz, Gerrit, Stuben, Hinnerk, Young, Ross and Zanotti, James (2022) Nucleon Form Factors from the Feynman-Hellmann Method in Lattice QCD. In: The 38th International Symposium on Lattice Field Theory, 2021-7-25 - ?.

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Official URL: http://dx.doi.org/10.22323/1.396.0426

Abstract

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.

Item Type:	Conference or Workshop Item (Unspecified)
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	13 Sep 2022 15:13
Last Modified:	15 Mar 2024 15:19
DOI:	10.22323/1.396.0426
Open Access URL:	https://arxiv.org/pdf/2202.01366.pdf
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3164573