Eur. Phys. J. A (2004) 19: 143-146
https://doi.org/10.1140/epjad/s2004-03-023-y

Hadrons in the nuclear medium

Rescattering and finite formation time effects in electro-disintegration of the deuteron in the cumulative region

¹ Department of High Energy Physics, S. Petersburg University, 198904 S. Petersburg, Russia
² Department of Physics, University of Perugia and INFN, Sezione di Perugia, via A. Pascoli, Perugia, I-06100, Italy
³ Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia

Received: 30 October 2003
Published online: 12 February 2004

Abstract

The role of rescattering due to the final state interaction (FSI) and the influence of the finite formation time (FFT) on the inclusive D(e,e′)X and exclusive D(e,e′p)n electro-disintegration of the deuteron are studied in the cumulative kinematical region x>1 and moderate values of the 4-momentum transfer Q ²=2÷ 10 (GeV/c)². The spins are averaged out. It is found that in the inclusive process the relative magnitude of rescattering steadily grows with x and that at x=1.7 it has the same order as the plane wave impulse approximation (PWIA) contribution, with the finite formation time effects decreasing the rescattering contribution by ~ 30%. In the exclusive process, with increasing momentum transfer, FFT substantially reduces the effects from FSI, although the latter are still appreciable in the region of momentum transfer investigated.