UCLA Particle Physics Research Group annual progress report Page: 4 of 200

                                
3.
modes and quantum numbers, and furthermore to measure the radiative decay ampli-
tudes, As it turns out these amplitudes provide one of the most important and
sensitive tests of the quark model. Finally, at some time in the future, we
plan to make an improved measurement of the magnetic dipole moment of the A-
resonance which gives a very basic test of the quark model, QCD and lattice
techniques.
Program II is "Investigations of Charge Symmetry and Isospin Invariance".
Both features appear in the quark model as accidental properties that do not
apply at the level of the basic Lagrangian. Oetailed experimental tests that
involve large momentum transfer processes are almost non existent and need to
be made.
Program III is "Tests of Time Reversal Invariance". The V-A current-current
theory of the weak interactions has one major flaw, namely that CP violation is
not accounted for. There is an ad hoc theory, the superweak model, designed to
patch up this flaw, but it lacks universality. As CP violation implies T violation,
which has major consequences in other areas of physics, we are engaged in testing
T-invariance in selected reactions.
Each of the above three programs has several parts involving different
experiments, they are listed below. The major part of this report consists of
detailed accounts of each experiment, many preliminary and some final results
obtained, and plans for new research.