Abstract
The fundamental importance of the massless particles in physics is seen from the fact that almost all known interactions are dominated by a massless particle (with an extrapolation to soft mesons (m→o) in the case of strong interactions) (Table 1).
Lecture given at the VIII. Internationale Universitätswochen für Kernphysik, Schladming, February 24–March 8, 1969.
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References
S. Weinberg, Phys. Rev. 135, B1049 (1964).
For a more general treatment see A. O. Barut, Phys. Letters 10, 356 (1964) and footnote to Table 1.
A. O. Barut, (to be published).
A. O. Barut, In Quantumelectrodynamics, ed. by P. Urban (Springer-Verlag, 1965).
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For a critical discussion see G. Kramer and W. F. Palmer, Argonne preprint (Dec. 1968).
A. O. Barut, IC/69/12 (Trieste preprint)
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S. L. Adler, Phys. Rev. 137, B1022 (1965).
A. O. Barut and C. B. Ünal, A. Ü. F. F. preprint 69/1 (to be published).
e.g. S. L. Adler and F. J. Gilman, Phys. Rev. 152, 1460 (1966) and references therein.
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Barut, A.O. (1969). Massless Particles and Analytic Continuation in Mass. In: Urban, P. (eds) Particle Physics. Acta Physica Austriaca, vol 6/1969. Springer, Vienna. https://doi.org/10.1007/978-3-7091-7638-2_1
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