# Electromagnetic form factors at large momenta from lattice QCD

A. J. Chambers, J. Dragos, R. Horsley, Y. Nakamura, H. Perlt, D. Pleiter, P. E. L. Rakow, G. Schierholz, A. Schiller, K. Somfleth, H. Stüben, R. D. Young, J. Zanotti

Research output: Contribution to journalArticlepeer-review

## 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 flavours of degenerate mass quarks corresponding to $m_\pi \approx 470 \text{ MeV}$. We are able to determine the electromagnetic form factors of the pion and nucleon up to approximately $6 \text{ GeV}^2$, with results for $G_E/G_M$ in the proton agreeing well with experimental results.
Original language English Physical Review D, Particles and fields D96 https://doi.org/10.1103/PhysRevD.96.114509 Published - 26 Dec 2017

• hep-lat

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