Electromagnetic form factors at large momenta from lattice QCD



Chambers, AJ, Dragos, J, Horsley, R, Nakamura, Y, Perlt, H, Pleiter, D, Rakow, PEL ORCID: 0000-0003-4486-2158, Schierholz, G, Schiller, A, Somfleth, K
et al (show 3 more authors) (2017) Electromagnetic form factors at large momenta from lattice QCD. PHYSICAL REVIEW D, 96 (11). 114509-.

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Abstract

Accessing hadronic form factors at large momentum transfers has traditionally presented a challenge for lattice QCD simulations. Here, we demonstrate how a novel implementation of the Feynman-Hellmann method can be employed to calculate hadronic form factors in lattice QCD at momenta much higher than previously accessible. Our simulations are performed on a single set of gauge configurations with three flavors of degenerate mass quarks corresponding to mπ≈470 MeV. We are able to determine the electromagnetic form factors of the pion and nucleon up to approximately 6 GeV2, with results for the ratio of the electric and magnetic form factors of the proton at our simulated quark mass agreeing well with experimental results.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 10 Dec 2018 16:45
Last Modified: 15 Mar 2024 07:29
DOI: 10.1103/PhysRevD.96.114509
Open Access URL: https://arxiv.org/abs/1702.01513
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3029661