Effective Isovector NN Interaction Strengths Determined from the 28Si\( p-->,p-->'\)28Si\(6-,T = 1\) Reaction
Abstract
We report measurements of σ\(θ\), A\(θ\), and polarization transfer for the 28Si\( p-->,p-->'\)28Si reaction to the 6-,T = 1 state at 14.36 MeV initiated with 198 MeV polarized protons. Normalization of the transition strength in the distorted-wave impulse approximation (DWIA) to inelastic electron scattering overpredicts the spin-longitudinal cross section by more than a factor of 2, while the spin-transverse cross section is nearly correct and the spin-orbit cross section is underpredicted. A reduced in-medium ρ-meson mass reproduces some of these features, while strong relativistic mean field or Pauli blocking effects are too small.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 1997
- DOI:
- 10.1103/PhysRevLett.78.1636
- Bibcode:
- 1997PhRvL..78.1636S