Pauli asks for details about Gürsey's formalism with a non-degenerate vacuum. He enumerates several problems which worry him, e.g. mirror states, classification of elementary particles, etc...
Sans titreHeisenberg writes of the re-writing of the manuscript of the pre print: on the eigenvalue problem and on the table of the quantum numbers.
Sans titrePauli writes on the treatment of the eigenvalue problem. The only existing method is the Tamm-Dancoff approximation but Pauli does not believe in it. He will possibly work on the problem with Gürsey. He speaks of a principal difficulty of model which is analogous to that in the "neutrino-theory of light". In the spinor model Pi-mesons and photons are composed of real states and only formally existing mirror states which must be forbidden. There is a discussion of the difficulties resulting from this.
Sans titreHeisenberg writes of the results of his calculations about eigenvalues for fermions and baryons. He replies to Pauli's letter of 10 February.
Sans titrePauli replies to Heisenberg's letter of 10 February to tell him that in Berkeley he has the opportunity to discuss their work with many people. He has more questions about the mirror-world (mirror nucleons and mirror difficulties of the spinor model and some problems of mathematical formalism.
Sans titrePauli returns briefly to the mirror problem.
Sans titrePauli gives more suggestions for the preparation of the publication. The connection of vacuum degeneration and strange particles must be emphasized. He has other suggestions for a clearer representation of their results.
Sans titreKällén replies to Pauli's arguments in his last letters.
Sans titreHeisenberg replies to the objections of Pauli in his last two letters, concerning the second draft of their pre print.
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