THE A(Q(2)) DEUTERON STRUCTURE-FUNCTION - THE CONTRIBUTION OF EXCHANGE CURRENTS ASSOCIATED WITH THE TRIANGLE-TRIANGLE COMPONENT AND THE NEUTRON CHARGE FORM-FACTOR

In the present work, contributions to the deuteron electromagnetic str ucture due to exchange currents involving the Delta Delta component ar e studied. For a 0.88% probability of this component, it is found that a substantially important contribution to the deuteron charge form fa ctor is obtained. It comes just second in order of importance after th at of the pion-pair current. This Delta Delta contribution has its ori gin in the usual pair current, but at the quark level. Taking into acc ount this new contribution implies a modification of the neutron charg e form factor, G(E)(n)(q(2)), which has been derived from the measurem ent of the structure function, A(q(2)). A, interesting observation is made about the derivation of this form factor. This calls for an exten sion of the accurate determination of A(q(2)) to higher values of q(2) .