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Off-shell effects in quasielastic electron nucleus scattering (1992)

Song, X. ; Chen, J. P. ; McCarthy, J. S.

Springer

The European physical journal 341 (1992), S. 275-287

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Details

ISSN: 1434-601X

Schlagwort(e): 25.30.Fj ; 13.60.Hb

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Using the Ward-Takahashi identity, on-shell condition, bound Dirac equation and off-shell expansion, a reduced version of half off-shell virtual photon nucleon vertex has been suggested. The vertex are decomposed into several different order terms: the on-shell terms, first and second off-shell terms. The off-shell behaviour of the form factors is discussed in the one meson loop model. Using the reduced vertex and parametrized off-shell form factors the quasielastic response functions are calculated for several nuclei at ¦q¦–kf and for56Fe at large ¦q¦ up to 1.14 GeV/c and at −q2=0.9 (GeV/c)2. The Coulomb sums are evaluated and a comparison of the theoretical prediction with data is given. The off-shell electron nucleon cross section is calculated and compared with the “cc1” off-shell extrapolation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01283536

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