Elastic Form Factors of $^{3,4}$He up to Large $Q^2$

摘要

Elastic electron scattering off $^3$He and $^4$He has recently been studiedat forward and backward scattering angles in Hall A at JLab. The results willprovide accurate data on the elastic form factors, charge and magnetic for$^3$He and charge only for $^4$He, up to squared momentum transfer $Q^2$-valuesof 3.2 GeV$^2$.