Updates on Nucleon Form Factors from Clover-on-HISQ Lattice Formulation

Abstract

Updates on results for the electric, magnetic and axial vector form factors are presented. The data analyzed cover high statistics measurements on 11 ensembles generated with 2+1+1 flavors of HISQ fermions by the MILC collaboration. The data cover the range $0.057\mathrm{fm}<a<0.15\mathrm{fm}$ in lattice spacing, $135\mathrm{MeV}<M_{\pi }<320\mathrm{MeV}$ in the pion mass and $3.3<M_{\pi }L<5.5$ in the lattice size. Fits to control excited-state contamination use up to 3-states in the spectral decomposition of the 3-point functions. The simultaneous chiral-continuum-finite-volume fits include leading order corrections in each of the three variables.

Comments: 7 pages, 6 figures, The 36th Annual International Symposium on Lattice Field Theory -- LATTICE2018 22-28 July, 2018, Michigan State University, East Lansing, Michigan, USA