Abstract
Proton recoil polarization was measured in the quasielastic reaction at and with unprecedented precision. The polarization-transfer coefficients are found to differ from those of the reaction, contradicting a relativistic distorted-wave approximation and favoring either the inclusion of medium-modified proton form factors predicted by the quark-meson coupling model or a spin-dependent charge-exchange final-state interaction. For the first time, the polarization-transfer ratio is studied as a function of the virtuality of the proton.
- Received 19 February 2010
DOI:https://doi.org/10.1103/PhysRevLett.105.072001
© 2010 The American Physical Society