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Projection operators in quantum theory of relativistic free fields

✍ Scribed by A. Aurilia; H. Umezawa

Book ID
110658634
Publisher
Springer-Verlag
Year
1967
Weight
860 KB
Volume
51
Category
Article
ISSN
0369-3546

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We show how the state of an unstable particle can be defined in terms of stable asymptotic states. This general definition is used to discuss and to solve some old problems connected with the short-time and large-time behaviour of the non-decay amplitude.