Methods of calculation for the T-matrix
In the preceding section we have shown how the observables can be expressed in terms of the T-matrix elements or in terms of the multipole amplitudes OLλ(μjls) which contain all the relevant information on the dynamical properties of the system. For the calculation of these amplitudes a variety of different methods have been developed utilizing various kinds of approximations.
KeywordsExchange Current Helicity Amplitude Electric Transition Covariant Approach Pion Photoproduction
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