Finite formation time effects in quasielastic (e,e ') scattering on nuclear targets - art. no. 034606

The problem of the final state interaction, in quasielastic (e,e') scatteri ng at large Q(2), is investigated by exploiting the idea that the ejected n ucleon needs a finite amount of time to assume its asymptotic form. It is s hown that when the dependence of the scattering amplitude of the ejected nu cleon on its virtuality is taken into account, the final state interaction is decreased. The developed approach is simpler to implement than the cine based on the color transparency description of the damping of the final sta te interaction, and is essentially equivalent to the latter in the case of the single rescattering term. The (e,e') process on the deuteron is numeric ally investigated and it is shown that, at x = 1, appreciable finite format ion time effects at Q(2) of the order of 10 (GeV/c)(2) are expected.