"Probing repulsive core of the nucleon-nucleon interaction via the 4He(e; e'pN) triple-coincidence reaction"

We studied simultaneously the 4He(e,e'p), 4He(e,e'pp) and 4He(e,e'pn) reactions at large momentum transfer, large missing momentum, and Bjorken X>1. The knocked-out proton was detected in coincidence with a proton or neutron recoiling almost back to back to the missing momentum leaving the residual A=2 system at low excitation energy. The measurement cover the region where the nucleon-nucleon (NN) force is expected to change from predominantly tensor to repulsive (most probably scalar).

Our data are compared with calculations of two-nucleon momentum distributions in 4He and discussed in the context of probing the elusive repulsive NN force.

Additional details of the upcoming Israeli Joint Nuclear Physics' Seminars can be found on the following link – Tel Aviv University: Israel Nuclear/Hadron Physics Joint Seminar