References
T. Das, G. S. Guralnik, V. S. Mathur, F. E. Low andJ. E. Young:Phys. Rev. Lett.,18, 759 (1967).
I. Kimel andR. Vergara Caffarelli:Lett. Nuovo Cimento,23, 227 (1978).
The original, infinite-range integration, Weinberg sum rules were first given inS. Weinberg:Phys. Rev. Lett.,18, 507 (1967).
Particle Data Group:Phys. Lett.,75 B, 1 (1978).
K. Kawarabayashi andM. Suzuki:Phys. Rev. Lett.,16, 255 (1966);Riazuddin andFayyazuddin:Phys. Rev.,147, 1071 (1966).
There are reports of a strange pseudoscalar at ∼1.4 GeV which could be the first radial excitation of theK. SeeG. W. Brandenburg, R. K. Carnegie, R. J. Cashmore, M. Davier, W. M. Dunwoodie, T. A. Lasinski, D. W. G. S. Leith, S. A. J. Matthews, P. Walden andS. H. Williams:Phys. Rev. Lett.,36, 1239 (1976). No π-like resonance has been reported to date.
Two recent references where the ∂(1250) was «seen» are:S. Bartalucci, S. Bertolucci, C. Bradaschia, M. Fiori, D. Fong, P. Giromini, S. Guiducci, T. Mc Corriston, C. Rippich, M. Rohde, A. Sermoneta andL. Trasatti: preprint DESY 77-59;N. M. Budnev, V. M. Budnev andV. V. Serebryakov:Phys. Lett.,70 B, 365 (1977).
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Sponsored by the Italian Government, CNPq and FINEP under the Technical Co-operation Agreement Brasil-Italia of November 30, 1972.
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Kimel, I., Caffarelli, R.V. Electromagnetic mass difference of pions and the radial excitations of the ρ-A1-π system. Lett. Nuovo Cimento 24, 245–248 (1979). https://doi.org/10.1007/BF02725416
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DOI: https://doi.org/10.1007/BF02725416