Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2009-11-04
Physics
Nuclear Physics
Nuclear Experiment
9 pages, 3 figures, talk given at the XXVIII International Workshop on Nuclear Theory, Rila Mountains, Bulgaria June 21-27 200
Scientific paper
Polarization transfer in quasi-elastic nucleon knockout is sensitive to the properties of the nucleon in the nuclear medium. In experiment E03-104 at Jefferson Lab we measured the proton recoil polarization in the 4He(e,e'p)3H reaction at a Q^2 of 0.8 (GeV/c)^2 and 1.3 (GeV/c)^2 with unprecedented precision. The measured polarization-transfer coefficients transverse and longitudinal to the momentum-transfer direction are well described by a fully relativistic calculation when a density-dependent medium modification of the nucleon form factors is included in the model. Results of an alternative model show that the ratio of these observables is also well described through strong charge-exchange final-state interactions. The induced polarization in the (e,e'p) reaction is sensitive to the final-state interactions and the data from E03-104 will further constrain these models.
for the Jefferson Lab Hall A Collaboration
Malace S.
Paolone Mario
Strauch Steffen
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