Speaker
Description
Charge radii of the light nuclei depend on the charge distributions of the proton and the neutron and on the nuclear structure --- the way how nucleons are distributed inside the nucleus. We present a high-accuracy calculation of the nuclear structure for A=2,3,4 nuclei using the latest two- and three-nucleon forces and charge density operators derived up through the fifth order in the chiral effective field theory. We predict the structure radii of the deuteron, the alpha-particle and the isoscalar combination of 3H and 3He, and perform a comprehensive analysis of various sources of uncertainties. Using the predicted value of the deuteron structure radius together with very precise spectroscopic data for the deuteron-proton charge radius difference we extract the neutron charge radius. Combining predicted alpha-particle structure radius with the precise 4He charge radius measurement we extract the charge radius of the proton. Finally, using the predicted isoscalar combination of the 3H and 3He structure radii and the preliminary experimental data for the 3He charge radius we estimate the charge radius of triton.
