Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-06-17
Phys.Rev.C82:054003,2010
Physics
Nuclear Physics
Nuclear Theory
21 pages,4 figures, a replacement of arXiv:1006.3499v1, additional calculations at different kinematics
Scientific paper
10.1103/PhysRevC.82.054003
A calculation of the $^3$He transverse $(e,e')$ inclusive response function, $R_T$, which includes $\Delta$ degrees of freedom is performed using the Lorentz integral transform method. The resulting coupled equations are treated in impulse approximation, where the $NNN$ and $NN\Delta$ channels are solved separately. As NN and NNN potentials we use the Argonne V18 and UrbanaIX models respectively. Electromagnetic currents include the $\Delta$-isobar currents, one-body N-currents with relativistic corrections and two-body currents consistent with the Argonne V18 potential. $R_T$ is calculated for the breakup threshold region at momentum transfers near 900 MeV/c. Our results are similar to those of Deltuva {\it et al.} in that large $\Delta$-isobar current contributions are found. However we find that these are largely canceled by the relativistic contribution from the one-body N-currents. Finally a comparison is made between theoretical results and experimental data.
Efros Victor D.
Leidemann Winfried
Tomusiak Edward L.
Yuan Luping
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