Speaker
Description
In this talk, I will show my recent analysis on the electric form factor of proton based on a parity doublet model. I first briefly review the two-parameter formula for nucleon electromagnetic form factors, and then explain how to construct the electric form factor within a parity-doublet model. The lowest-order rho-NN and omega-NN couplings are determined to reproduce the properties of nuclear matter at normal nuclear density, while higher-order couplings are determined to reproduce the electric form factor of proton.
I find that the experimental data of electric form factor are beautifully reproduced for the certain range of the chiral invariant mass. The result here suggests that electromagnetic form factors can provide constraints on the chiral invariant mass.