Magnetic form factors of the octet baryons from lattice QCD and chiral extrapolation

Understand

We present a 2+1--flavor lattice QCD calculation of the electromagnetic Dirac and Pauli form factors of the octet baryons.

• The magnetic Sachs form factor is extrapolated at six fixed values of $Q^2$ to the physical pseudoscalar masses and infinite volume using a formulation based on heavy baryon chiral perturbation theory with finite-range regularization.
• We properly account for omitted disconnected quark contractions using a partially-quenched effective field theory formalism.
• The results compare well with the experimental form factors of the nucleon and the magnetic moments of the octet baryons.