Measurements of the electron-helicity asymmetry in the quasi-elastic ${\rm A}(\vec{e},e' p)$ process
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2021
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866929634188197888 |
|---|---|
| author | Kolar, Tim Paul, Sebouh J. Achenbach, Patrick Arenhövel, Hartmuth Ashkenazi, Adi Beričič, Jure Böhm, Ralph Bosnar, Damir Brecelj, Tilen Cline, Ethan Cohen, Erez O. Distler, Michael O. Esser, Anselm Friščić, Ivica Gilman, Ronald Giusti, Carlotta Heilig, Matthias Hoek, Matthias Izraeli, David Kegel, Simon Klag, Pascal Korover, Igor Lichtenstadt, Jechiel Mardor, Israel Merkel, Harald Middleton, Duncan G. Mihovilovič, Miha Müller, Julian Müller, Ulrich Olivenboim, Mor Piasetzky, Eliezer Pochodzalla, Josef Ron, Guy Schlimme, Björn S. Schoth, Matthias Schulz, Florian Sfienti, Concettina Širca, Simon Spreckels, Rouven Štajner, Samo Stöttinger, Yvonne Strauch, Steffen Thiel, Michaela Tyukin, Alexey Weber, Adrian Yaron, Israel |
| author_facet | Kolar, Tim Paul, Sebouh J. Achenbach, Patrick Arenhövel, Hartmuth Ashkenazi, Adi Beričič, Jure Böhm, Ralph Bosnar, Damir Brecelj, Tilen Cline, Ethan Cohen, Erez O. Distler, Michael O. Esser, Anselm Friščić, Ivica Gilman, Ronald Giusti, Carlotta Heilig, Matthias Hoek, Matthias Izraeli, David Kegel, Simon Klag, Pascal Korover, Igor Lichtenstadt, Jechiel Mardor, Israel Merkel, Harald Middleton, Duncan G. Mihovilovič, Miha Müller, Julian Müller, Ulrich Olivenboim, Mor Piasetzky, Eliezer Pochodzalla, Josef Ron, Guy Schlimme, Björn S. Schoth, Matthias Schulz, Florian Sfienti, Concettina Širca, Simon Spreckels, Rouven Štajner, Samo Stöttinger, Yvonne Strauch, Steffen Thiel, Michaela Tyukin, Alexey Weber, Adrian Yaron, Israel |
| contents | We present measurements of the electron helicity asymmetry in quasi-elastic proton knockout from $^{2}$H and $^{12}$C nuclei by polarized electrons. This asymmetry depends on the fifth structure function, is antisymmetric with respect to the scattering plane, and vanishes in the absence of final-state interactions, and thus it provides a sensitive tool for their study. Our kinematics cover the full range in off-coplanarity angle $ϕ_{pq}$, with a polar angle $θ_{pq}$ coverage up to about 8 degrees. The missing energy resolution enabled us to determine the asymmetries for knock-out resulting in different states of the residual $^{11}$B system. We find that the helicity asymmetry for $p$-shell knockout from $^{12}$C depends on the final state of the residual system and is relatively large (up to $\approx 0.16$), especially at low missing momentum. It is considerably smaller (up to $\approx 0.01$) for $s$-shell knockout from both $^{12}$C and $^2$H. The data for $^2$H are in very good agreement with theoretical calculations, while the predictions for $^{12}$C exhibit differences with respect to the data. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2107_00763 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Measurements of the electron-helicity asymmetry in the quasi-elastic ${\rm A}(\vec{e},e' p)$ process Kolar, Tim Paul, Sebouh J. Achenbach, Patrick Arenhövel, Hartmuth Ashkenazi, Adi Beričič, Jure Böhm, Ralph Bosnar, Damir Brecelj, Tilen Cline, Ethan Cohen, Erez O. Distler, Michael O. Esser, Anselm Friščić, Ivica Gilman, Ronald Giusti, Carlotta Heilig, Matthias Hoek, Matthias Izraeli, David Kegel, Simon Klag, Pascal Korover, Igor Lichtenstadt, Jechiel Mardor, Israel Merkel, Harald Middleton, Duncan G. Mihovilovič, Miha Müller, Julian Müller, Ulrich Olivenboim, Mor Piasetzky, Eliezer Pochodzalla, Josef Ron, Guy Schlimme, Björn S. Schoth, Matthias Schulz, Florian Sfienti, Concettina Širca, Simon Spreckels, Rouven Štajner, Samo Stöttinger, Yvonne Strauch, Steffen Thiel, Michaela Tyukin, Alexey Weber, Adrian Yaron, Israel Nuclear Experiment We present measurements of the electron helicity asymmetry in quasi-elastic proton knockout from $^{2}$H and $^{12}$C nuclei by polarized electrons. This asymmetry depends on the fifth structure function, is antisymmetric with respect to the scattering plane, and vanishes in the absence of final-state interactions, and thus it provides a sensitive tool for their study. Our kinematics cover the full range in off-coplanarity angle $ϕ_{pq}$, with a polar angle $θ_{pq}$ coverage up to about 8 degrees. The missing energy resolution enabled us to determine the asymmetries for knock-out resulting in different states of the residual $^{11}$B system. We find that the helicity asymmetry for $p$-shell knockout from $^{12}$C depends on the final state of the residual system and is relatively large (up to $\approx 0.16$), especially at low missing momentum. It is considerably smaller (up to $\approx 0.01$) for $s$-shell knockout from both $^{12}$C and $^2$H. The data for $^2$H are in very good agreement with theoretical calculations, while the predictions for $^{12}$C exhibit differences with respect to the data. |
| title | Measurements of the electron-helicity asymmetry in the quasi-elastic ${\rm A}(\vec{e},e' p)$ process |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2107.00763 |