20 research outputs found
Polarization Transfer in the ^4He(\vec e,e'\vec p)^3H Reaction up to Q^2 = 2.6 (GeV/c)^2
We have measured the proton recoil polarization in the ^4He(\vec e,e'\vec
p)^3H 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 predicted medium modification of the
proton form factors based on a quark-meson coupling model. In contrast, the
measured induced polarizations agree reasonably well with the fully
relativistic calculation indicating that the treatment of final-state
interactions is under control.Comment: 5 pages, 3 figures, uses revtex.sty, submitted to Physical Review
Letter