Summary
A systematic group-theoretical method is used to determine the isotopic spin amplitudes and crossing relations for processes involving particles with arbitrary isotopic spins. For two-body reactions, the scalar amplitudes and the crossing matrices are explicitly given up to I=3/2.
Riassunto
Si usa un metodo teorico di gruppo sistematico per determinare le ampiezze dello spin isotopico e le relazioni d‘incrocio per i processi che coinvolgono particelle con spin isotopici arbitrari. Per le reazioni a due corpi, si danno esplicitamente le ampiezze scalari e le matriei d‘inorocio sino a I=3/2.
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References
A. O. Barut:Phys. Rev.,127, 321 (1962);A. O. Barut, I. Muzinich andD. N. Williams:Construction of invariant amplitudes and analytic continuation in total angulxr momentum, UCRL-Report 10463 (to be published).
G. F. Chew:S-Matrix Theory of Strong Interactions (New York, 1962)
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Supported in part by the Air Force Office of Scientific Research.
On leave from the Faculty of Sciences, University of Ankara.
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Barut, A.O., Unal, B.C. Amplitudes and crossing relations in isospin. Nuovo Cim 28, 112–117 (1963). https://doi.org/10.1007/BF02806054
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DOI: https://doi.org/10.1007/BF02806054