6533b82dfe1ef96bd1291e57

RESEARCH PRODUCT

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

I. KoroverM. O. DistlerE.o. CohenMichaela ThielM. OlivenboimM. SchothT. KolarU. MüllerConcettina SfientiPatrick AchenbachS. ŠIrcaS. ŠIrcaS. StrauchB. S. SchlimmeR. BöhmIsrael MardorM. MihovilovičM. MihovilovičD. IzraeliT. BreceljJ. LichtenstadtI. YaronE. PiasetzkyA. WeberS. ŠTajnerAnselm EsserGuy RonRonald GilmanHarald MerkelAdi Ashkenazi

subject

PhysicsNuclear and High Energy PhysicsProton010308 nuclear & particles physicsNuclear TheoryFOS: Physical sciencesElectronPolarization (waves)01 natural scienceslcsh:QC1-999Transverse plane0103 physical sciencesPhysics::Accelerator PhysicsNuclear Experiment (nucl-ex)Atomic physics010306 general physicsNuclear ExperimentMicrotronNuclear Experimentlcsh:PhysicsNuclear density

description

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.

yearjournalcountryeditionlanguage
2017-11-27
10.1016/j.physletb.2018.03.027http://arxiv.org/abs/1711.09680