Journal Article

FZJ-2023-05729

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Opposite-parity contaminations in lattice nucleon form factors

Stokes, F. (Corresponding author)FZJ* ; Kamleh, W. ; Leinweber, D. B.

2019
American Physical Society Ridge, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevD.99.074506  doi:10.34734/FZJ-2023-05729

Abstract: The recently-introduced Parity Expanded Variational Analysis (PEVA) technique allows for theisolation of baryon eigenstates at finite momentum free from opposite-parity contamination. Inthis paper, we establish the formalism for computing form factors of spin-1/2 states using PEVA.Selecting the vector current, we compare the electromagnetic form factors of the ground statenucleon extracted via this technique to a conventional parity-projection approach. Our results showa statistically significant discrepancy between the PEVA and conventional analyses. This indicatesthat existing calculations of matrix elements of ground state baryons at finite momentum can beaffected by systematic errors of ∼20 % at physical quark masses. The formalism introduced hereprovides an effective approach to removing these systematic errors.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 5111 - Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)

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Database coverage:
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