Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-01-19
Eur.Phys.J.A31:155-162,2007
Physics
Nuclear Physics
Nuclear Theory
9 pages, 5 figures
Scientific paper
10.1140/epja/i2007-10001-y
The role of center-of mass (CM) effects in the one-body nuclear current in the description of electromagnetically induced two-nucleon knockout reactions is discussed in connection with the problem of the lack of orthogonality between initial bound states and final scattering states obtained by the use of an energy-dependent optical model potential. Results for the cross sections of the exclusive $^{16}$O(e,e$'$pp)$^{14}$C and $^{16}$O($\gamma$,pp)$^{14}$C knockout reactions in different kinematics are presented and discussed. In super-parallel kinematics CM effects produce a strong enhancement of the $^{16}$O(e,e$'$pp)$^{14}$C$_{\rm g.s.}$ cross section which strongly reduces the destructive interference between the one-body and $\Delta$-current and the sensitivity to the treatment of the $\Delta$-current found in previous work.
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Boffi Sigfrido
Giusti Carlotta
Pacati Franco Davide
Schwamb Michael
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