Trinucleon charge form factor

The trinucleon charge form factors are studied for various nuclear interaction models with possible three-body force and meson-exchange-current effects included. A unitary transformation method of generating three-body forces is discussed. Various meson-exchange effects, including pair and recoil currents as well as that of the πNN vertex function, are investigated. The calculations show that the strong potential dependence of the ³He charge form factor in the impulse approximation diminishes considerably when meson-exchange effects are included. Exchange effects in ³H are smaller than in ³He and do not reduce the potential dependence. By including meson-exchange currents and three-body forces, good fits to the available ³He and ³H form factor data for 0.5 fm^-2≤q²≤12 fm^-2 are obtained without sacrificing a satisfactory triton binding energy. The position of the diffraction minimum is correctly predicted and the height of the second maximum is improved to about half of the experimental value.NUCLEAR STRUCTURE ³He, ³H; calculated charge form factors; pair and recoil exchange currents included; effect of πNN vertex function; dependence on nuclear force; six two-body forces, two three-body forces.