Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter
Abstract 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...
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2021
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| Online Access: | https://hdl.handle.net/1721.1/131360 |
| _version_ | 1826194067846856704 |
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| author | Guèye, P. Kabir, A. A Giuliani, P. Glister, J. Lee, B. W Gilman, R. Higinbotham, D. W Piasetzky, E. Ron, G. Sarty, A. J Strauch, S. Adeyemi, A. Allada, K. Armstrong, W. Arrington, J. Arenaövel, H. Beck, A. Benmokhtar, F. Berman, B. L Boeglin, W. |
| author_facet | Guèye, P. Kabir, A. A Giuliani, P. Glister, J. Lee, B. W Gilman, R. Higinbotham, D. W Piasetzky, E. Ron, G. Sarty, A. J Strauch, S. Adeyemi, A. Allada, K. Armstrong, W. Arrington, J. Arenaövel, H. Beck, A. Benmokhtar, F. Berman, B. L Boeglin, W. |
| author_sort | Guèye, P. |
| collection | MIT |
| description | Abstract
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 of
$$^{12}$$
12
C 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 of
$$^{12}$$
12
C 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. |
| first_indexed | 2024-09-23T09:50:00Z |
| format | Article |
| id | mit-1721.1/131360 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:50:00Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1313602021-09-21T03:55:21Z Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter Guèye, P. Kabir, A. A Giuliani, P. Glister, J. Lee, B. W Gilman, R. Higinbotham, D. W Piasetzky, E. Ron, G. Sarty, A. J Strauch, S. Adeyemi, A. Allada, K. Armstrong, W. Arrington, J. Arenaövel, H. Beck, A. Benmokhtar, F. Berman, B. L Boeglin, W. Abstract 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 of $$^{12}$$ 12 C 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 of $$^{12}$$ 12 C 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. 2021-09-20T17:16:43Z 2021-09-20T17:16:43Z 2020-05-18 2020-09-24T21:01:26Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131360 The European Physical Journal A. 2020 May 18;56(5):126 en https://doi.org/10.1140/epja/s10050-020-00135-7 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Guèye, P. Kabir, A. A Giuliani, P. Glister, J. Lee, B. W Gilman, R. Higinbotham, D. W Piasetzky, E. Ron, G. Sarty, A. J Strauch, S. Adeyemi, A. Allada, K. Armstrong, W. Arrington, J. Arenaövel, H. Beck, A. Benmokhtar, F. Berman, B. L Boeglin, W. Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter |
| title | Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter |
| title_full | Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter |
| title_fullStr | Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter |
| title_full_unstemmed | Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter |
| title_short | Dispersive corrections in elastic electron-nucleus scattering: an investigation in the intermediate energy regime and their impact on the nuclear matter |
| title_sort | dispersive corrections in elastic electron nucleus scattering an investigation in the intermediate energy regime and their impact on the nuclear matter |
| url | https://hdl.handle.net/1721.1/131360 |
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