Physics Letters B (Aug 2019)
Quasi-elastic polarization-transfer measurements on the deuteron in anti-parallel kinematics
- S. Paul,
- D. Izraeli,
- T. Brecelj,
- I. Yaron,
- P. Achenbach,
- H. Arenhövel,
- A. Ashkenazi,
- J. Beričič,
- R. Böhm,
- D. Bosnar,
- E. Cline,
- E.O. Cohen,
- L. Debenjak,
- M.O. Distler,
- A. Esser,
- I. Friščić,
- R. Gilman,
- M. Heilig,
- S. Kegel,
- P. Klag,
- Y. Kohl,
- T. Kolar,
- I. Korover,
- J. Lichtenstadt,
- I. Mardor,
- H. Merkel,
- D.G. Middleton,
- M. Mihovilovič,
- J. Müller,
- U. Müller,
- M. Olivenboim,
- E. Piasetzky,
- J. Pochodzalla,
- G. Ron,
- B.S. Schlimme,
- M. Schoth,
- F. Schulz,
- C. Sfienti,
- S. Širca,
- S. Štajner,
- S. Strauch,
- M. Thiel,
- A. Tyukin,
- A. Weber
Affiliations
- S. Paul
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel; Corresponding author.
- D. Izraeli
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- T. Brecelj
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- I. Yaron
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- P. Achenbach
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- H. Arenhövel
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- A. Ashkenazi
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- J. Beričič
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- R. Böhm
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- D. Bosnar
- Department of Physics, Faculty of Science, University of Zagreb, HR-10000 Zagreb, Croatia
- E. Cline
- Rutgers, The State University of New Jersey, Piscataway, NJ 08855, USA
- E.O. Cohen
- School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
- L. Debenjak
- Jožef Stefan Institute, 1000 Ljubljana, Slovenia
- M.O. Distler
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- A. Esser
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- I. Friščić
- Department of Physics, Faculty of Science, University of Zagreb, HR-10000 Zagreb, Croatia
- R. Gilman
- Rutgers, The State University of New Jersey, Piscataway, NJ 08855, USA
- M. Heilig
- Universität Konstanz, Fachbereich Physik, Universitätsstraße 10, 78464 Konstanz, Germany
- S. Kegel
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- P. Klag
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- Y. Kohl
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- 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
- D.G. Middleton
- 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; Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana, Slovenia
- J. Müller
- 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
- J. Pochodzalla
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- 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
- F. Schulz
- 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. Tyukin
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- A. Weber
- Institut für Kernphysik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
- Journal volume & issue
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Vol. 795
pp. 599 – 605
Abstract
We present measurements of the polarization-transfer components in the H2(e→,e′p→) reaction, covering a previously unexplored kinematic region with large positive (anti-parallel) missing momentum, pmiss, up to 220MeV/c, and Q2=0.65 (GeV/c)2. These measurements, performed at the Mainz Microtron (MAMI), were motivated by theoretical calculations which predict small final-state interaction (FSI) effects in these kinematics, making them favorable for searching for medium modifications of bound nucleons in nuclei. We find in this kinematic region that the measured polarization-transfer components Px and Pz and their ratio agree with the theoretical calculations, which use free-proton form factors. Using this, we establish upper limits on possible medium effects that modify the bound proton's form factor ratio GE/GM at the level of a few percent. We also compare the measured polarization-transfer components and their ratio for 2H to those of a free (moving) proton. We find that the universal behavior of 2H, 4He and 12C in the double ratio (Px/Pz)A(Px/Pz)H1 is maintained in the positive missing-momentum region.
