Calibration of the K600 Focal Plane Polarimeter

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

An Attempt to Study T=2 States in 16-N

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

Weak decays of 4He-Lambda

We measured the lifetime and the mesonic and non-mesonic decay rates of the 4He-Lambda hypernucleus. The hypernuclei were created using a 750 MeV/c momentum K- beam on a liquid 4He target by the reaction 4He(K-,pi-)4He-Lambda. The 4He-Lambda lifetime was directly measured using protons from Lambda p -> n p non-mesonic decay (also referred to as proton-stimulated decay) and was found to have a value of tau = 245 +/- 24 ps. The mesonic decay rates were determined from the observed numbers of pi-'s and pi0's as Gamma_pi-/Gamma_tot = 0.270 +/- 0.024 and Gamma_pi0/Gamma_tot = 0.564 +/- 0.036, respectively, and the values of the proton- and neutron-stimulated decay rates were extracted as Gamma_p/Gamma_tot = 0.169 +/- 0.019 and Gamma_n/Gamma_tot <= 0.032 (95% CL), respectively. The effects of final-state interactions and possible 3-body Lambda N N decay contributions were studied in the context of a simple model of nucleon-stimulated decay. Nucleon-nucleon coincidence events were observed and were used in the determination of the non-mesonic branching fractions. The implications of the results of this analysis were considered for the empirical Delta I = 1/2 rule and the decay rates of the 4H-Lambda hypernucleus.Comment: 15 pages, 11 figures, published in PRC, revised content to match published versio

The High Resolution K600 Spectrometer

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

The K600 Focal Plane Polarimeter

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

The High Resolution K600 Spectrometer

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

Measurements of the Spin Observables D_NN' and P in the Inelastic Proton Scattering from 12-C and 16-O at 200 MeV

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

Spin Flip Probabilities in 208-Pb Measured with 200 MeV Protons

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

The K600 Focal Plane Polarimeter

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

Precise Determinations of Proton Analyzing Powers for 180-200 MeV Elastic Scattering on 12-C and 4-He

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