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The Q spin-parity assignment has been checked at several energies, see,e.g.,C. Y. Chien,P. M. Dauber,E. I. Malamud,D. J. Mellema,P. E. Schlein,P. A. Schreiner,W. E. Slater,D. H. Stork,H. K. Ticho andT. G. Trippe:Phys. Lett.,28 B, pp143 (1968) (7. 3 GeV/c);M. S. Farber, T. Ferbel, P. F. Slattery andH. Yuta:Phys. Rev. D,1, 78 (1970). It was also checked on the present sample for all (Kππ) masses between 1.2 and 1.35 GeV. All «illegal moments» withl<3 were found to be compatible with zero within ≤2 standard deviations. An analysis of the Q decay Dalitz plot has shown that the amplitude corresponding to a 1+ object decaying into a vector and a pseudoscalar meson describes at least 80% of the reaction.
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CERN visiting scientist 1970 from Physics Department, University of California, Berkeley, Cal. 94720.
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Grard, F., Herquet, P., Windmolders, R. et al. Test of helicity conservation in the reaction K+p→Q+p (Data from the International K+ Collaboration.). Lett. Nuovo Cimento 2, 305–311 (1971). https://doi.org/10.1007/BF02803929
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DOI: https://doi.org/10.1007/BF02803929