Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter
Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter
复制标题
弹性电子-核散射的色散校正:中间能状态及其对核物质影响的研究
DOI:
10.1140/epja/s10050-020-00135-7
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Sarty, A. J.
中科院分区:
文献类型:
--
作者:
Guèye, P.;Kabir, A. A.;Giuliani, P.;Glister, J.;Lee, B. W.;Gilman, R.;Higinbotham, D. W.;Piasetzky, E.;Ron, G.;Sarty, A. J.
Measurements of elastic electron scattering data within the past decade have highlighted two-photon exchange contributions as a necessary ingredient in theoretical calculations to precisely evaluate hydrogen elastic scattering cross sections. This correction can modify the cross section at the few percent level. In contrast, dispersive effects can cause significantly larger changes from the Born approximation. The purpose of this experiment is to extract the carbon-12 elastic cross section around the first diffraction minimum, where the Born term contributions to the cross section are small to maximize the sensitivity to dispersive effects. The analysis uses the LEDEX data from the high resolution Jefferson Lab Hall A spectrometers to extract the cross sections near the first diffraction minimum ofC at beam energies of 362 MeV and 685 MeV. The results are in very good agreement with previous world data, although with less precision. The average deviation from a static nuclear charge distribution expected from linear and quadratic fits indicate a 30.6% contribution of dispersive effects to the cross section at 1 GeV. The magnitude of the dispersive effects near the first diffraction minimum ofC has been confirmed to be large with a strong energy dependence and could account for a large fraction of the magnitude for the observed quenching of the longitudinal nuclear response. These effects could also be important for nuclei radii extracted from parity-violating asymmetries measured near a diffraction minimum.
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DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
P. Guèye;M. Bernheim;J. Danel;J. Ducret;L. Lakehal;J. Goff;A. Magnon;C. Marchand;J. Morgenstern;J. Marroncle;P. Vernin;A. Zghiche;V. Breton;S. Frullani;F. Garibaldi;F. Ghio;M. Jodice;D. Isabelle;Z. Meziani;E. Offermann;M. Traini
通讯作者:
M. Traini
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
A. Afanasev;N. Merenkov
通讯作者:
N. Merenkov
影响因子:
8.6
作者:
Kalantar;de Jager CW;Offermann;de Vries H;Cardman;Emrich;Hersman;Miska;Rychel
通讯作者:
Rychel
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
M. Rekalo;E. Tomasi
通讯作者:
E. Tomasi
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
M. Iodice;E. Cisbani;S. Colilli;R. Crateri;S. Frullani;F. Garibaldi;F. Giuliani;M. Gricia;M. Lucentini;A. Mostarda;L. Pierangeli;F. Santavenere;G. Urciuoli;R. Leo;L. Lagamba;A. Leone;R. Perrino;S. Kerhoas;I. C. Lugol;B. Mazeav;P. Vernin;A. Zaccarian
通讯作者:
A. Zaccarian