Relativistic nuclear structure effects in (e,e' vec{p})

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Abstract

Results for recoil nucleon induced polarization for \((e,e'\vec{p})\) are presented using various approximations for the relativistic nucleonic current, at the kinematics of a recent experiment at Bates. We see that the dynamical relativistic effects improve the agreement with the data. We make predictions for the induced normal polarization and responses for TJNAF 89-033 and Mainz A1/2-93 experiments.

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Most cited references 8

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Inelastic Electron-Nucleus Scattering and Nucleon-Nucleon Correlations

L. van Hove, K. W. McVoy (1962)

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Spectroscopic Factors in \(^{40}\)Ca and \(^{208}\)Pb from \((e,e'p)\): Fully Relativistic Analysis

P Sarriguren, J Udías, E. de Guerra … (1993)

We present results for spectroscopic factors of the outermost shells in \(^{40}\)Ca and \(^{208}\)Pb, which have been derived from the comparison between the available quasielastic (\(e,e'p\)) data from NIKHEF-K and the corresponding calculated cross-sections obtained within a fully relativistic formalism. We include exactly the effect of Coulomb distortion on the electron wave functions and discuss its role in the extraction of the spectroscopic factors from experiment. Without any adjustable parameter, we find spectroscopic factors of about 70\%, consistent with theoretical predictions. We compare our results with previous relativistic and nonrelativistic analyses of (\(e,e'p\)) data. In addition to Coulomb distortion effects we discuss different choices of the nucleon current operator and also analyze the effects due to the relativistic treatment of the outgoing-distorted and bound nucleon wave functions.

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Relativistic versus Nonrelativistic Optical Potentials in A(e,e'p)B Reactions

J. Caballero, E. Garrido, E. de Guerra … (1993)

We investigate the role of relativistic and nonrelativistic optical potentials used in the analysis of (\(e,e'p\)) data. We find that the relativistic calculations produce smaller (\(e,e'p\)) cross sections even in the case in which both relativistic and nonrelativistic optical potentials fit equally well the elastic proton--nucleus scattering data. Compared to the nonrelativistic impulse approximation, this effect is due to a depletion in the nuclear interior of the relativistic nucleon current, which should be taken into account in the nonrelativistic treatment by a proper redefinition of the effective current operator.