Nucleon to $\Delta$ and $\Delta$ form factors in Lattice QCD

TL;DR

This paper reports on lattice QCD calculations of nucleon to Delta transition form factors, focusing on the electromagnetic and quadrupole form factors, using dynamical fermion configurations with pion masses around 300 MeV.

Contribution

It provides new lattice QCD results on N to Delta transition form factors, especially the sub-dominant quadrupole components, at near-physical pion masses.

Findings

Determined electromagnetic form factors of the N to Delta transition.

Extracted quadrupole form factors indicating deformation.

Used dynamical fermion configurations with pion mass ~300 MeV.

Abstract

We present recent lattice QCD results on the electroweak nucleon to $\Delta$ transition and $\Delta$ form factors using dynamical fermion gauge configurations with a lowest pion mass of about 300 MeV, with special emphasis in the determination of the sub-dominant quadrupole $N\gamma^*\rightarrow \Delta$ and $\Delta$ electromagnetic form factors.