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The Longitudinal and transverse responses in the inclusive electron scattering: A Functional approach

R. Cenni
(
- Genoa U. and
- INFN, Genoa
)
,
F. Conte
(
- Genoa U. and
- INFN, Genoa
)
,
P. Saracco
(
- Genoa U. and
- INFN, Genoa
)

Feb, 1997

57 pages

Published in:

Nucl.Phys.A 623 (1997) 391-430

e-Print:

nucl-th/9702026 [nucl-th]

DOI:

10.1016/S0375-9474(97)88421-7

Report number:

GEF-TH-2-97

View in:

ADS Abstract Service

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Abstract:

The splitting between the charge-longitudinal and spin-transverse responses is explained in a model whose inputs are the effective interactions in the particle-hole channels in the frame of the first order boson loop expansion. It is shown that the interplay between

\omega

-meson exchange and box diagrams (two-meson exchange with simultaneous excitation of one or two nucleons to

\Delta

's) mainly rules the longitudinal response, while in the transverse one the direct

\Delta

excitations almost cancel the one-loop correction and the response is mainly governed by the

\rho

-meson rescattering inside the nucleus. It is also shown that a small variation in the nuclear densities may explain the observed discrepancies between different nuclei.

Note:

LaTex2e file with 53 .ps figures; submitted to Nucl. Phys A Report-no: GEF-TH-2/97

21.65
25.30
electron nucleus: nuclear reaction
carbon
calcium
cross section: energy dependence
cross section: longitudinal
cross section: transverse
functional analysis
model: nuclear reaction

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