The question, “What is an elementary particle?” must find its answer primarily in experiment, although it must also be confronted with philosphical considerations. I will therefore begin by giving a short survey of the important experimental results of the last fifty years. This survey will show that a critical unbiased study of these results already gives an answer to the question; theory, as we shall see, cannot add much to this answer.
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© 1976 American Institute of Physics.
1976
American Institute of Physics
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