Measurement of polarization-transfer to bound protons in carbon and its virtuality dependence

A1 Collaboration

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13 Scopus citations

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→,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
Volume781
DOIs
StatePublished - 10 Jun 2018
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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