Polarization transfer in the 4He(e-->,e'p-->)3H reaction up to Q2=2.6 (GeV/c)2.
2003
We have measured the proton recoil polarization in the 4 He(e, e'p) 4 H reaction at Q 2 = 0.5, 1.0, 1.6, and 2.6 (GeV/c) 2 . The measured ratio of polarization transfer coefficients differs from a fully relativistic calculation, favoring the inclusion of a medium modification of the proton form factors predicted by a quark-meson coupling model. In addition, the measured induced polarizations agree reasonably well with the fully relativistic calculation indicating that the treatment of final-state interactions is under control.
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