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References
S. Weinberg:Phys. Rev. Lett.,18, 507 (1967);T. Das, V. S. Mathur andS. Okubo:Phys. Rev. Lett.,18, 761 (1967).
K. Dietz andH. Pietschmann (preprint, Universität Bonn, 1967) have taken into account 2-particle states in obtaining a sum rule for ω-ϕ mixing.
See, for instance,J. J. Sakurai:Phys. Rev. Lett.,19, 803 (1967).
F. Zachariasen:Phys. Rev.,121, 1851 (1961);W. Thirring:Phys. Rev.,126, 1209 (1962). Mass relations for 0− and 1− mesons were obtained from such a model byH. Pietschmann:Phys. Rev.,139, B 446 (1965).
N. Kroll, T. D. Lee andB. Zumino:Phys. Rev.,157, 1376 (1967).
F. Gilman andH. Harari: (Phys. Rev.,165, 1803 (1968))
Modification of the second sum rule to take into account symmetry breaking was suggested byT. Das, V. S. Mathur andS. Okubo:Phys. Rev. Lett.,19, 470 (1967), and byJ. J. Sakurai (ref. (3) See, for instance,J. J. Sakurai:Phys. Rev. Lett.,19, 803 (1967).
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Work supported in part by the U.S. Atomic Energy Commission (Report No. NYO-2262TA-174).
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Lam, W.S., Raman, K. Unitarity corrections in spectral-function sum rules. Nuovo Cimento A (1965-1970) 56, 237–240 (1968). https://doi.org/10.1007/BF02820291
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DOI: https://doi.org/10.1007/BF02820291