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Measurement of polarization transfer in the quasi-elastic $^{40}{\rm Ca}(\vec{e},e' \vec{p})$ process

Fuente: arXiv

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Détails bibliographiques
Auteurs principaux:	Kolar, T., Achenbach, P., Christmann, M., Distler, M. O., Doria, L., Eckert, P., Esser, A., Giusti, C., Geimer, J., Gülker, P., Hoek, M., Klag, P., Lichtenstadt, J., Littich, M., Manoussos, T., Markus, D., Merkel, H., Mihovilovič, M., Müller, J., Müller, U., Pätschke, J., Paul, S. J., Plura, E. Piasetzky S., Pochodzalla, J., Požun, M., Ron, G., Schlimme, B. S., Sfienti, C., Stengel, S., Stephan, E., Strauch, S., Szyszka, C., Širca, S., Thiel, M., Wilczek, A.
Format:	Preprint
Publié:	2023
Sujets:	Nuclear Experiment
Accès en ligne:	Acceder al recurso
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_version_	1866909430974513152
author	Kolar, T. Achenbach, P. Christmann, M. Distler, M. O. Doria, L. Eckert, P. Esser, A. Giusti, C. Geimer, J. Gülker, P. Hoek, M. Klag, P. Lichtenstadt, J. Littich, M. Manoussos, T. Markus, D. Merkel, H. Mihovilovič, M. Müller, J. Müller, U. Pätschke, J. Paul, S. J. Plura, E. Piasetzky S. Pochodzalla, J. Požun, M. Ron, G. Schlimme, B. S. Sfienti, C. Stengel, S. Stephan, E. Strauch, S. Szyszka, C. Širca, S. Thiel, M. Wilczek, A.
author_facet	Kolar, T. Achenbach, P. Christmann, M. Distler, M. O. Doria, L. Eckert, P. Esser, A. Giusti, C. Geimer, J. Gülker, P. Hoek, M. Klag, P. Lichtenstadt, J. Littich, M. Manoussos, T. Markus, D. Merkel, H. Mihovilovič, M. Müller, J. Müller, U. Pätschke, J. Paul, S. J. Plura, E. Piasetzky S. Pochodzalla, J. Požun, M. Ron, G. Schlimme, B. S. Sfienti, C. Stengel, S. Stephan, E. Strauch, S. Szyszka, C. Širca, S. Thiel, M. Wilczek, A.
contents	Polarization transfer to a bound proton in polarized electron knock-out reactions, $\mathrm{A}(\vec{e},e^{\prime}\vec{p})$, is a powerful tool to look for in-medium modification of the bound proton. It requires comparison to calculations which consider the many-body effects accompanying the quasi-free process. We report here measured components $P_x^{\prime}$, $P_z^{\prime}$, and their ratio $P_x^{\prime}/P_z^{\prime}$, of polarization transfer to protons bound in $^{40}\mathrm{Ca}$, which is described well by the shell model and for which reliable calculations are available. While the calculations capture the essence of the data, our statistical precision allows us to observe deviations which cannot be explained by simple scaling, including by varying the proton electromagnetic form factor ratio $G_E/G_M$. We further explore the deviations of the ratio of the polarization transfer components from that of a free proton, $(P_x^{\prime}/P_z^{\prime})_{\rm A}/(P_x^{\prime}/P_z^{\prime})_{\rm H}$, and its dependence on the bound-proton virtuality.
format	Preprint
id	arxiv_https___arxiv_org_abs_2306_05565
institution	arXiv
publishDate	2023
record_format	arxiv
spellingShingle	Measurement of polarization transfer in the quasi-elastic $^{40}{\rm Ca}(\vec{e},e' \vec{p})$ process Kolar, T. Achenbach, P. Christmann, M. Distler, M. O. Doria, L. Eckert, P. Esser, A. Giusti, C. Geimer, J. Gülker, P. Hoek, M. Klag, P. Lichtenstadt, J. Littich, M. Manoussos, T. Markus, D. Merkel, H. Mihovilovič, M. Müller, J. Müller, U. Pätschke, J. Paul, S. J. Plura, E. Piasetzky S. Pochodzalla, J. Požun, M. Ron, G. Schlimme, B. S. Sfienti, C. Stengel, S. Stephan, E. Strauch, S. Szyszka, C. Širca, S. Thiel, M. Wilczek, A. Nuclear Experiment Polarization transfer to a bound proton in polarized electron knock-out reactions, $\mathrm{A}(\vec{e},e^{\prime}\vec{p})$, is a powerful tool to look for in-medium modification of the bound proton. It requires comparison to calculations which consider the many-body effects accompanying the quasi-free process. We report here measured components $P_x^{\prime}$, $P_z^{\prime}$, and their ratio $P_x^{\prime}/P_z^{\prime}$, of polarization transfer to protons bound in $^{40}\mathrm{Ca}$, which is described well by the shell model and for which reliable calculations are available. While the calculations capture the essence of the data, our statistical precision allows us to observe deviations which cannot be explained by simple scaling, including by varying the proton electromagnetic form factor ratio $G_E/G_M$. We further explore the deviations of the ratio of the polarization transfer components from that of a free proton, $(P_x^{\prime}/P_z^{\prime})_{\rm A}/(P_x^{\prime}/P_z^{\prime})_{\rm H}$, and its dependence on the bound-proton virtuality.
title	Measurement of polarization transfer in the quasi-elastic $^{40}{\rm Ca}(\vec{e},e' \vec{p})$ process
topic	Nuclear Experiment
url	https://arxiv.org/abs/2306.05565