12 Scopus citations


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→,ep→) 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.

Original languageEnglish
Pages (from-to)95-98
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - 10 Jun 2018


FundersFunder number
Israel Academy of Arts and Sciences
U.S. National Science Foundation
National Science Foundation1614456, PHY-1205782
National Science Foundation
Deutsche ForschungsgemeinschaftCollaborative Research Center 1044
Deutsche Forschungsgemeinschaft
Ministry of Science, Technology and Space
Israel Science Foundation390/15
Israel Science Foundation
Javna Agencija za Raziskovalno Dejavnost RSP1–0102
Javna Agencija za Raziskovalno Dejavnost RS
Hrvatska Zaklada za Znanost1680
Hrvatska Zaklada za Znanost


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