Measurement Near Threshold of 9-Be(3-He, Pi) to the A = 12 Isobaric Triplet by Recoil Detection

This work was supported by the National Science Foundation Grant NSF PHY 81-14339 and by Indiana Universit

Report on Experiment CE06: Measurements of Nuclear Reactions using Recoil Detection

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Simultaneous Softening of sigma and rho Mesons associated with Chiral Restoration

Complex poles of the unitarized pi-pi scattering amplitude in nuclear matter are studied. Partial restoration of chiral symmetry is modeled by the decrease of in-medium pion decay constant f*_{pi}. For large chiral restoration (f*_{pi}/f_{pi} << 1), 2nd sheet poles in the scalar (sigma) and the vector (rho) mesons are both dictated by the Lambert W function and show universal softening as f*_{pi} decreases. In-medium pi-pi cross section receives substantial contribution from the soft mode and exhibits a large enhancement in low-energy region. Fate of this universality for small chiral restoration (f*_{pi}/f_{pi} ~ 1) is also discussed.Comment: 5 pages, 4-eps figures, version accepted by Phys. Rev. C (R) with minor modification

Measurement of (p,pi) and (3-He,pi) Reactions by Recoil Detection

This research was sponsored by the National Science Foundation Grant NSF PHY 87-1440

12-C(p,pi+)13-C and 12-C(p,pi0)13-N(g.s.) Reaction Cross Sections Measured by Recoil Detection

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Measurement of (p,pi) and (p,y) Reactions by Recoil Detection

This research was sponsored by the National Science Foundation Grant NSF PHY 87-1440