Physics Letters B (Jun 2018)
Measurement of polarization-transfer to bound protons in carbon and its virtuality dependence
- D. Izraeli,
- T. Brecelj,
- P. Achenbach,
- A. Ashkenazi,
- R. Böhm,
- E.O. Cohen,
- M.O. Distler,
- A. Esser,
- R. Gilman,
- T. Kolar,
- I. Korover,
- J. Lichtenstadt,
- I. Mardor,
- H. Merkel,
- M. Mihovilovič,
- U. Müller,
- M. Olivenboim,
- E. Piasetzky,
- G. Ron,
- B.S. Schlimme,
- M. Schoth,
- C. Sfienti,
- S. Širca,
- S. Štajner,
- S. Strauch,
- M. Thiel,
- A. Weber,
- I. Yaron
Affiliations
- D. Izraeli
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel; Corresponding author.
- T. Brecelj
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- P. Achenbach
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- A. Ashkenazi
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- R. Böhm
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- E.O. Cohen
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- M.O. Distler
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- A. Esser
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- R. Gilman
- Rutgers, The State University of New Jersey, Piscataway, NJ 08855, USA
- T. Kolar
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- I. Korover
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel; Department of Physics, NRCN, P.O. Box 9001, Beer-Sheva 84190, Israel
- J. Lichtenstadt
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- I. Mardor
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel; Soreq NRC, Yavne 81800, Israel
- H. Merkel
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- M. Mihovilovič
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia; Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- U. Müller
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- M. Olivenboim
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- E. Piasetzky
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- G. Ron
- Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel
- B.S. Schlimme
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- M. Schoth
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- C. Sfienti
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- S. Širca
- Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana, Slovenia; Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- S. Štajner
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- S. Strauch
- University of South Carolina, Columbia, SC 29208, USA
- M. Thiel
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- A. Weber
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- I. Yaron
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- Journal volume & issue
-
Vol. 781
pp. 95 – 98
Abstract
We measured the ratio Px/Pz of the transverse to longitudinal components of polarization transferred from electrons to bound protons in C12 by the C12(e→,e′p→) process at the Mainz Microtron (MAMI). We observed consistent deviations from unity of this ratio normalized to the free-proton ratio, (Px/Pz)C12/(Px/Pz)H1, for both s- and p-shell knocked out protons, even though they are embedded in averaged local densities that differ by about a factor of two. The dependence of the double ratio on proton virtuality is similar to the one for knocked out protons from H2 and He4, suggesting a universal behavior. It further implies no dependence on average local nuclear density.
