[en] A concise description of the experiments that make up the CHAOS program at TRIUMPF site is presented. (author)

[en] A simple model of the ¹⁶O(π, π') quasifree scattering reaction is presented, and compared to experimental data. The model incorporates the same features as Monte Carlo neutrino generators for the CCQE reaction. (author)

[en] Angular distributions associated with the absorption of positive and negative pions at 65 MeV bombarding energy on ³He have been measured. Both positive and negative pion reactions exhibit angular correlations of proton-proton or proton-neutron coincidences which follow the d(π⁺,2p) kinematics. (Auth.)

[en] A distorted-wave impulse-approximation calculation for 50-MeV π^+- inelastic scattering to the 2₁⁺ state in ²⁶Mg has been performed. The calculation shows greater sensitivity to the separate neutron and proton deformations than is seen with any other nuclear probe. A fit to the measured differential cross sections gives the value of 0.83 +- 0.06 for the ratio of neutron to proton matrix elements for this state. This is in agreement with the values deduced with other probes

[en] We have measured energies and angular distributions of three protons detected in coincidence following absorption of 228 MeV π⁺ in carbon. The counters used were arranged in a geometry that should have enabled observation of the two-step process of proton knockout followed by quasi-deuteron absorption of the recoil pion. The absence of high energy protons emitted in the backward direction provides strong evidence that such a two-step process does not contribute appreciably to the total absorption cross section, and suggests that in fact the pion may scatter several times before finally being absorbed on a quasi-deuteron

No abstract available

[en] Using the new experimental data on iT/sub 11/, T/sub 20/, tau/sub 21/, and tau/sub 22/, presented in the first two parts of this work, along with existing differential cross section data, a helicity amplitude reconstruction of πd elastic scattering has been performed at T/sub π/ = 256 and 294 MeV. Model-independent information has been obtained for the amplitudes B, (A²+C²)/sup 1/2/, D, and the phase phi/sub D/. Taking two relations from a theoretical model in addition to the five existing observables, the seven real components of the πd helicity amplitudes have been determined. These amplitudes have then been used to calculate spin-transfer observables and the partial-wave components of the scattering amplitude

No abstract available

[en] The vector analyzing power iT₁₁ has been measured for the πd→pp reaction at an incident pion energy of 65 MeV, using a vector polarized deuteron target. The data are compared with predictions from coupled channels, Faddeev, and perturbation theory calculations

[en] Threefold differential cross sections σ(θ/sub π/,θ/sub p/,P/sub p/) have been measured in a kinematically complete experiment. The experiment has been designed to extend earlier measurements into the kinematic region of the np final-state interaction. The data are compared with the predictions from the new relativistic Faddeev theory of Garcilazo