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I present 0 to 800 MeV nucleon-nucleon elastic and inelastic phase parameters derived by several groups: Arndt & Roper; Hoshizaki; Bugg; Bystricky, Lechanoine, & Lehar; and Bryan, Clark, & VerWest. Resonant-like behavior appears in the 1D2 and 3F3 states above the inelastic threshold in Hoshizaki’s analysis but not in Arndt & Roper’s. The np data are inadequate to permit determination...
The determination of a reliable nucleon-nucleon potential is one of the fundamental problems in nuclear physics, since it is the basic ingredient in almost any microscopic calculation of nuclear properties. In fact, if the only aim would be to get a basic understanding of the NN-interaction in free two-body scattering, either by correlating NN, NΠ,ΠΠ and NN̄-data in the framework...
In the past year nucleon-nucleon physics has been moving ahead rapidly especially on the experimental side. Data reported last year at the Vancouver and Tokyo conferences cleared up some old ambiguities below 50 MeV in the P states and the 3S1−3D1 mixing parameter. Evidence from TRIUMF and ANL was beginning to give us an inkling of the impact that the new data from intermediate energies would have...
Over the last year or so, new and quite interesting polarization data have become available from various accelerators. I am going to review some of the results which look the most interesting to me, and discuss the interpretations one might give to them. I will try to point out areas where various people believe experimental results might be suggesting an important clue about the underlying theory...
This report concerns mainly some experimental problems related to tests of conservation laws and symmetry principles in intermediate energy physics. The principal symmetries considered are charge independence, CI, charge symmetry, CS, and time reversal invariance, T, in the electromagnetic interaction of hadrons. Tests involving neutral particles in the initial and final states are among the most...
All the intermediate energy facilities currently possess research programs involving the use of nucleon probes to both elucidate detailed structure of the nucleon-nucleon interaction as well as to explore the high momentum characteristics of nucleon reactions with nuclear systems. In this paper I will present a review of recent experimental activity concerning the production of pions by both polarised...
In the last few years high quality data for pion production in proton-proton and neutron-proton scattering have been obtained in the so-called intermediate energy range. These data are often analysed using resonance models. New experiments are being planned to study nonresonant parts of the cross section and also the effects of specific spin amplitudes. The dramatic spin dependence of the elastic...
Recent developments in the investigation of pion-nuclear scattering at low energy and in the region of the 3.3 resonance are reviewed. The emphasis is on approaches which are on a microscopic level as far as the treatment of higher order many-body corrections to lowest order multiple scattering expansions are concerned. The importance of pion absorption and production in few-nucleon systems (D, 3He,...
The title implies a smorgasbord of 30 different reactions arranged in Table 1 in four categories. We shall concentrate on reactions involving the three-nucleon systems; hence the above title. There are interesting new data in category one, especially on pion elastic scattering and charge exchange on the H3−He3 isospin doublet. It provides an interesting test of the applicability of charge symmetry...
The three body nuclear reactions are of special interest in the nonrelativistic nuclear physics. Understanding of those will favour the progress in investigations of structure and dynamics of ensembles of strongly interacting particles.
In this talk I will briefly examine the recent, mainly experimental, developments that have occurred in the field of lepton scattering. The interest in this domain results from the fact that the electromagnetic form factors (particularly the monopole charge form factors) provide us with the most detailed and cleanest information on the nuclear wave function. The small radius, high density region of...
In this report I shall briefly outline those contributions to Discussion Session 5 (DS5) which seem most important to me. As far as possible an attempt will also be made to place these contributions in the context of current developments in the appropriate field. Of course, it will be only too painfully obvious that given the wide range of topics included in DS5—ranging from low energy n-d scattering...
Three-nucleon scattering data are reviewed with particular emphasis on the precision achieved. A brief review of four-nucleon scattering data is also given, in particular four-nucleon final states are discussed.
This talk is going to consist mostly of an experimental review of polarization effects in the three-nucleon system. There is a richness of experimental possibilities, many of which have been carried out, that arises from the complex spin structure of the system, i.e., ½ + 1 → ½ + 1 for the elastic process and ½ + 1 → ½ + ½ + ½ for the inelastic or breakup process. Most of the work in the past has...
One of the relatively simple systems in nuclear physics which is interesting to study in view of its richness in structure, like the presence of excited states, is the A = 4 system. In the past a great wealth of experimental information has been accumulated about it [1]. Because of the few number of particles involved one may hope that the non-relativistic quantum problem of these systems can in principle...
Today, and for the next several years, the few-body theorist who is willing to confront data directly, has a unique opportunity to make contributions of significance and broad interest in Elementary Particle Physics. The contributed works at this meeting, for the most part, have ignored such possibilities, and rather than review these papers (which speak clearly for themselves), I shall try to present,...
It is notoriously difficult to obtain reliable results for quantum mechanical scattering problems. Since they involve complicated interference phenomena of waves any simple uncontrolled approximation is not worth more than the weather forecast. However, for two body problems with central forces the computer can be used to calculate the phase shifts so one may consider such problems as solved, and...
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