Scaling violation in the separated response functions of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">C</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>12</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Finn, John M.; Lourie, R.; Cottman, B. H.

doi:10.1103/physrevc.29.2230

Cited by 41 publications

(23 citation statements)

References 25 publications

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“…(35,36) using the fact that 1/ cos 2 χ T L = 1 + tan 2 χ T L . In the data sets considered in the previous section the angle χ T L Scaling of the first kind of the longitudinal and transverse response functions has been studied some time ago by Finn et al [44]. These authors found that, over the region q from 250 to 550 MeV/c, the longitudinal response of 12 C showed good scaling, while the transverse response did not.…”

Section: Scaling Of Separated Responsesmentioning

confidence: 97%

Superscaling of inclusive electron scattering from nuclei

1999

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We investigate the degree to which the concept of superscaling, initially developed within the framework of the relativistic Fermi gas model, applies to inclusive electron scattering from nuclei. We find that data obtained from the low energy loss side of the quasielastic peak exhibit the superscaling property, i.e. the scaling functions f (ψ ′ ) are not only independent of momentum transfer (the usual type of scaling: scaling of the first kind), but coincide for A ≥ 4 when plotted versus a dimensionless scaling variable ψ ′ (scaling of the second kind). We use this behavior to study as yet poorly understood properties of the inclusive response at large electron energy loss.

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Section: Scaling Of Separated Responsesmentioning

confidence: 97%

Superscaling of inclusive electron scattering from nuclei

1999

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“…The longitudinal and transverse reduced response functions, f L and f T , for 3 He at q ≈ 500 MeV/c [4] are equal, in accordance with the predictions of independent particle models. However, f L is ≈40% smaller than f T for heavier nuclei including 4 He, 12 C, 40 Ca, 56 Fe, and 238 U [5][6][7][8][9][10][11] at q ≈ 500 MeV/c. This indicates the presence of a non-quasifree process that may depend on the density or number of available nucleons.…”

Section: Introductionmentioning

confidence: 99%

Quasielastic12C(e,e′p)reaction at high momentum transfer

et al. 1999

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We measured the 12 C(e,e ′ p) cross section as a function of missing energy in parallel kinematics for (q, ω) = (970 MeV/c, 330 MeV) and (990 MeV/c, 475 MeV). At ω = 475 MeV, at the maximum of the quasielastic peak, there is a large continuum (Em > 50 MeV) cross section extending out to the deepest missing energy measured, amounting to almost 50% of the measured cross section. The ratio of data to DWIA calculation is 0.4 for both the p-and s-shells. At ω = 330 MeV, well below the maximum of the quasielastic peak, the continuum cross section is much smaller and the ratio of data to DWIA calculation is 0.85 for the p-shell and 1.0 for the s-shell. We infer that one or more mechanisms that increase with ω transform some of the single-nucleon-knockout into multinucleon knockout, decreasing the valence knockout cross section and increasing the continuum cross section.

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“…Today, we have reliable separations of S L and S T for several nuclei between 3 He and 56 F e (Carlson et al, 2003;Finn et al, 1984;Jourdan, 1996). They come from analyses of the world data, thus including the largest possible ǫ-range.…”

Section: Fig 29 Separated Response Functions Formentioning

confidence: 99%

“…For a number of nuclei and momentum transfers L/T-separations have been performed (Altemus et al, 1980;Barreau et al, 1983;Blatchley et al, 1986;Chen et al, 1991;Deady et al, 1986Deady et al, , 1983Finn et al, 1984;Meziani et al, 1992;VanReden et al, 1990;Williamson et al, 1997;Yates et al, 1993;Zimmerman, 1969). Often (but not always, see e.g.…”

Section: Fig 29 Separated Response Functions Formentioning

confidence: 99%

Electron-Nucleus Scattering

Benhar

Fabrocini

Schiavilla

1994

Electron-Nucleus Scattering

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This article presents a review of the field of inclusive quasi-elastic electron-nucleus scattering. It discusses the approach used to measure the data and includes a compilation of data available in numerical form. The theoretical approaches used to interpret the data are presented. A number of results obtained from the comparison between experiment and calculation are then reviewed. The analogies and differences to other fields of physics exploiting quasi-elastic scattering from composite systems are pointed out. I. INTRODUCTIONThe energy spectrum of high-energy leptons (electrons in particular) scattered from a nuclear target displays a number of features. At low energy loss (ω) peaks due to elastic scattering and inelastic excitation of discrete nuclear states appear; a measurement of the corresponding form factors as a function of momentum transfer |q| gives access to the Fourier transform of nuclear (transition) densities. At larger energy loss, a broad peak due to quasi-elastic electron-nucleon scattering appears; this peak -very wide due to nuclear Fermi motion -corresponds to processes where the electron scatters from an individual, moving nucleon, which, after interaction with other nucleons, is ejected from the target. At even larger ω peaks that correspond to excitation of the nucleon to distinct resonances are visible. At very large ω, a structureless continuum due to Deep Inelastic Scattering (DIS) on quarks bound in nucleons appears. A schematic spectrum is shown in Fig. 1. At momentum transfers above approximately 500 MeV/c the dominant feature of the spectrum is the quasi-elastic peak.A number of questions have been investigated using quasi-elastic scattering:• The quasi-elastic cross section integrated over electron energy loss is proportional to the sum of electron-nucleon cross sections. Historically, this has been exploited in order to measure the neutron charge and magnetic form factors using mainly light (A < 4) nuclear targets. Today the emphasis has shifted to exposing possible medium modifications of the nucleon form factors. * Electronic address: benhar@roma1.infn.it † Electronic address: dbd@virginia.edu ‡ Electronic address: ingo.sick@unibas.ch

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Scaling violation in the separated response functions ofC12

Cited by 41 publications

References 25 publications

Superscaling of inclusive electron scattering from nuclei

Superscaling of inclusive electron scattering from nuclei

Quasielastic12C(e,e′p)reaction at high momentum transfer

Electron-Nucleus Scattering

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