He4(e,e'p)

Sofia Quaglioni

¹

,

V.D. Efros

²

,

Winfried Leidemann

³

et al.

Abstract

An ab initio calculation of the 4 He(e, e ′ p) 3 H longitudinal response is presented. The use of the integral transform method with a Lorentz kernel has allowed to take into account the full fourbody final state interaction (FSI). The semirealistic nucleon-nucleon potential MTI-III and the Coulomb force are the only ingredients of the calculation. The reliability of the direct knock-out hypothesis is discussed both in parallel and in non parallel kinematics. In the former case it is found that lower missing momenta and higher momentum transfers are preferable to minimize effects beyond the plane wave impulse approximation (PWIA). Also for non parallel kinematics the role of antisymmetrization and final state interaction become very important with increasing missing momentum, raising doubts about the possibility of extracting momentum distributions and spectroscopic factors. The comparison with experimental results in parallel kinematics, where the Rosenbluth separation has been possible, is discussed.

Electromagnetic reactions on light nuclei

“…Regarding exclusive electron scattering reactions, the 4 He(e, e p) 3 H process was studied, e.g., by Quaglioni et al in Ref. [217]. Because often (e, e p) experiments are performed to excited state of 4 He with different Hamiltonians and in IA for the charge operator.…”

Photodisintegration of light nuclei for testing a correlated realistic interaction in the continuum

“…A similar formalism has been applied to describe exclusive electromagnetic processes in the four-body system with semirealistic potentials [41,42,43]. Recently, the method has been also applied to the harmonic oscillator basis in the framework of NCSM [44].…”

The Lorentz Integral Transform and its Inversion

“…[6,7,8,9,10,11,12]) and A = 6, 7 [13,14] have been carried out. In some cases also exclusive reactions have been considered [15,16,17]. Various successful comparisons to results of conventional calculations, with explicit continuum state wave functions, have been performed for the two-and three-body systems [1,3,18,19,20,21].…”